What's Special About This Number?

Because of this site, I now see that Numbers are fun!

OK. When I was still in school, I always thought that math was really for the uber-smart people. Specially Calculus (both integral and differential) but man!!!! When I saw this site, it just brought out the curiosity in me! All mathematical terms are linked so you can find out what those terms mean...

ex:

6 is the smallest perfect number.
38 is the last Roman numeral when written lexicographically.
42 is the 5th Catalan number.
2285 is a non-palindrome with a palindromic square.
2357 is the concatenation of the first 4 primes.

and on... and on...


(via the Presurfer)