12887656 has 8 divisors (see below), whose sum is σ = 24164370. Its totient is φ = 6443824.

The previous prime is 12887627. The next prime is 12887657. The reversal of 12887656 is 65678821.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 285156 = 3550^2 + 534^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12887657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805471 + ... + 805486.

Almost surely, 2^12887656 is an apocalyptic number.

It is an amenable number.

12887656 is a deficient number, since it is larger than the sum of its proper divisors (11276714).

12887656 is a wasteful number, since it uses less digits than its factorization.

12887656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610963 (or 1610959 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 12887656 is about 3589.9381610273. The cubic root of 12887656 is about 234.4541791382.

The spelling of 12887656 in words is "twelve million, eight hundred eighty-seven thousand, six hundred fifty-six".