A friend of mine recently prompted me to unearth the total secrecy that is my favorite number. When I casually explained to him that there was no way for me, a graduate of mathematics, to pick just one of the many awesome numbers that exists, he told me to simply list some of them anyway. As I began to list and explain my favorite numbers, he then said I should write a blog post about the many numbers that I like along with the reasons I like them.
So here we go. Let’s do this – I’m psyched! But before I begin I would like to say that there are some numbers I like for no particular reason at all other than I think they are cool… Now without further ado I present to you
#’s I <3
0 (zero) – zero is the identity of the real numbers under addition, which is to say for all x in the reals, x + 0 = x. Zero reminds me of a number that yields to no other number in as far as multiplication. Sure he’s like a pushover when dealing with the operation of addition, but multiplication is like HIS place, you know? Since the product of any number and zero is always zero I feel like zero secretly has a “pffft, you can’t mess with me, I’m ZERO” mentality. Zero is also neither positive nor negative, (0,0) marks the origin (where the x and y axes intersect) , (o,o,o) marks the origin of a three dimensional Cartesian coordinate system (where the x, y, and z axes are coincident). I often wonder if we graphed the universe on a three dimensional coordinate system what location would be considered the origin of the universe…where is (0,0,0) in our universe? Speaking of the universe, it is rumored that if one successfully divides by zero that the universe explodes.
1 (one) – I like the number one because it is the unity of the commutative ring of real numbers under ordinary addition and multiplication, which means that it is simply the identity of the real numbers under multiplication. Monists like Parmenides and Zeno believed that the only true being is “The One”, and that everything else we perceive is susceptible to corruption and deceit. And this fact sparks a plethora of worth having philosophical debates. There are also many properties in mathematics that produce the number one, such as:

.999… (.999 repeating) – since I like 1, I consequently also like .999… since .999… = 1. The proof of this is as follows:
we know 1/3 = .333…
we also know that 1/3+1/3+1/3 = 1
therefore .333… + .333… + .333… = 1 by substitution
therefore .999… = 1 b/c .333.. + .333… + .333… = .999… by addition.
2 (two) – I love the number 2. It is simultaneously the first positive even number and the first prime number. Incidentally, it is the ONLY even prime number since every even number after 2 is divisible by 2! In fact, the number 2 is part of the definition equations for even and odd numbers: 2n and 2n+1 respectively (where n is any integer). very cool. I’ve also heard that it takes two to tango, but I have yet to see a proof for this claim.
√2 (square root 2) - √2 is one of two irrational numbers that I like, the other being pi. When I was in ring theory I did a project involving Z[√2]….or maybe it was Q[√2]…I don’t remember. What do remember is becoming strangely attached the the number √2. Another cool thing about √2 is that the diagonal of a 1×1 square is √2 using the Pythagorean theorem.
i (square root -1; the imaginary number) – all throughout elementary school and part of middle school I believe that taking the square root of a negative number was simply impossible…and then one day my teacher was like “okay so the square root of negative 1 is i,” and I was like “wait what…?” And all of a sudden there was like this whole other realm of mathematics! I like i because it is imaginary in an already abstract world. If you think about it, our imagination produces objects or things/events outside of reality – they are abstract. So when you are talking about mathematics (which is an abstract entity by nature) and you then talk about imaginary numbers, it’s like an abstraction in an abstraction. i is also the main contributor to the construction of the complex numbers, which are of the form a + bi, where a and b are real numbers.
3 (three) - The number 3 is awesome because any three points define a plane (or said differently: any 3 points are coplanar). It is also the number of vertices our first regular n-gon has, called an equilateral triangle. I love the triangle. You can make so many things out of the triangle (more on this below) – it’s awesome. Also, “Three is a magic number.”
4 (four) – There are a lot of reasons I like the number 4, but probably the main reason is because of the tetrahedron. The tetrahedron is the first of 5 platonic solids, but here’s the crazy part: it’s constructed using four equilateral triangles! The number 3 when added 4 times produces a three dimensional object with 4 vertices! Who would have ever thought! In case you don’t know what a tetrahedron is, imagine folding the triforce up so that the empty middle triangle of the triforce is now the base of the tetrahedron and the 3 gold pieces are the “sides” which all meet at one point at the “top”….did that even help? whatever. The tetrahedron is my favorite platonic solid.
π (pi) – π is the second of my two favorite irrational numbers. You can find π if you are given the radius and circumference of ANY circle by dividing the circumference by two times the radius (which is just the diameter of the circle). There are people who can recite an insane amount of digits of pi, and I am certainly not one of them.
7 (seven) – seven is awesome because Final Fantasy VII will forever be the greatest installment in the Final Fantasy series.
24 (twenty four) and 27 (twenty seven) – there is no particular reason that I like these numbers…i just do.
1111 (one thousand, one hundred and eleven) - I like this number because 11:11 am and pm are the only times of the day that all four digits on a digital clock are the same. It’s make a wish time!
25 (twenty five) – I like twenty five because it is a perfect square, and it was my graduation seat number when I graduated with my masters degree =)
1.67 (one point six seven) – i don’t know why…but in high school this was the answer to like 65% of math problems
There are many more numbers that I like, and perhaps I can write about them another time. But for now I hope you enjoyed reading about a select few of my favorite numbers!
Also, there is this one book that I don’t know the name of…nor do I know who wrote it…but it’s a book of a TON of numbers and why they are interesting. It’s definitely worth trying to find. If you find it let me know, because I’ve been looking for it with little success.
also http://en.wikipedia.org/wiki/Interesting_number_paradox just for funzies.
-mock