It is a tau number, because it is divible by the number of its divisors (32).
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656256.
It is an unprimeable number.
656256 is a Friedman number, since it can be written as 6+6*5^6*(5+2), using all its digits and the basic arithmetic operations.
2656256 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
656256 is a wasteful number, since it uses less digits than its factorization.
656256 is an odious number, because the sum of its binary digits is odd.
The square root of 656256 is about 810.0962905729. The cubic root of 656256 is about 86.9009309615.
Subtracting from 656256 its reverse (652656), we obtain a square (3600 = 602).
The spelling of 656256 in words is "six hundred fifty-six thousand, two hundred fifty-six".