12831256 has 8 divisors (see below), whose sum is σ = 24058620. Its totient is φ = 6415624.

The previous prime is 12831227. The next prime is 12831293. The reversal of 12831256 is 65213821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12831256² = 329282261075072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801946 + ... + 801961.

Almost surely, 2^12831256 is an apocalyptic number.

It is an amenable number.

12831256 is a deficient number, since it is larger than the sum of its proper divisors (11227364).

12831256 is a wasteful number, since it uses less digits than its factorization.

12831256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603913 (or 1603909 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 12831256 is about 3582.0742594201. The cubic root of 12831256 is about 234.1116665758. Note that the first 3 decimals are identical.

The spelling of 12831256 in words is "twelve million, eight hundred thirty-one thousand, two hundred fifty-six".