631256 has 16 divisors (see below), whose sum is σ = 1246200. Its totient is φ = 298944.

The previous prime is 631249. The next prime is 631259. The reversal of 631256 is 652136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631259) by changing a digit.

631256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925 + ... + 2228.

2⁶³¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

631256 is a deficient number, since it is larger than the sum of its proper divisors (614944).

631256 is a wasteful number, since it uses less digits than its factorization.

631256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178 (or 4174 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 631256 is about 794.5162049952. The cubic root of 631256 is about 85.7831203675.

The spelling of 631256 in words is "six hundred thirty-one thousand, two hundred fifty-six".