12856613 has 24 divisors (see below), whose sum is σ = 16572864. Its totient is φ = 9757440.

The previous prime is 12856603. The next prime is 12856621. The reversal of 12856613 is 31665821.

It is a happy number.

It is not a de Polignac number, because 12856613 - 2⁶ = 12856549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12856613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36245 + ... + 36597.

It is an arithmetic number, because the mean of its divisors is an integer number (690536).

Almost surely, 2^12856613 is an apocalyptic number.

It is an amenable number.

12856613 is a deficient number, since it is larger than the sum of its proper divisors (3716251).

12856613 is a wasteful number, since it uses less digits than its factorization.

12856613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 414 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 12856613 is about 3585.6119421934. The cubic root of 12856613 is about 234.2657814796.

The spelling of 12856613 in words is "twelve million, eight hundred fifty-six thousand, six hundred thirteen".