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May 11, 2010 15:44

Today is blah. so much crap on my plate. My birthday is tomorrow. I am turning 25. The big 25. A quarter century. Doesn't seem like that is crazy old, but for some reason I am totally all bout the old age today. Blah

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xbettiemachetex May 12 2010, 18:30:36 UTC
25 is an excellent number! Did you know that it is the smallest square that is also a sum of two (non-zero) squares: 25 = 3² + 4²??

25 is a centered octagonal number and an automorphic number.

25 has an aliquot sum of 6 and is the first number to have an aliquot sequence that does not culminate in 0 through a prime. Twenty-five is the aliquot sum of three integers; 95, 119, and 143. Twenty-five is the second composite member of the 6-aliquot tree.

It is the smallest base 10 Friedman number as it can be expressed by its own numbers: 5².

It is also a Cullen number. 25 is the smallest pseudoprime satisfying the congruence 7n = 7 mod n.

25 is the smallest aspiring number - a composite non-sociable number whose aliquot sequence does not terminate.

It's the atomic number of manganese!! Come on here 25 is awesome! Appreciate it! Live it up! You're only 25 once!

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