Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

Unique Properties of 325

  • 325 is the smallest number that is the sum of 2 squares in exactly 3 ways
  • 325 is the smallest triangular number that is the hypotenuse of a primitive Pythagorean triangle such that a leg of the triangle is also a triangular number
  • 325 is the smallest and the only known 3-hyperperfect number
  • 325 is the smallest odd unprimeable number — it can not be turned into a prime number by changing just one of its digits to any other digit

Common Properties of 325