325 = 52 x 13.
325 is the 25th triangular number (the sum of the first 25 integers): 1 + 2 + 3 + . . . + 25 = 325.
In base 2, 325 is the palindromic number 101000101; in base 4, it is 11011; and in base 8, it is 505.
325 is the smallest number to be the sum of two squares in three different ways: 325 = 12 + 182 = 62 + 172 = 102 + 152.
325 is the hypotenuse of two primitive Pythagorean triples: 3252 = 362 + 3232 = 2042 + 2532.
Currently undergoing restoration, the USS LST-325, launched in 1942, participated in the invasion of Sicily in 1943 and in June 1944 landed at Omaha Beach.
Source: Positive Integers
