12556971 has 48 divisors (see below), whose sum is σ = 22297600. Its totient is φ = 6840288.

The previous prime is 12556969. The next prime is 12556997. The reversal of 12556971 is 17965521.

12556971 is a `hidden beast` number, since 1 + 25 + 569 + 71 = 666.

It is not a de Polignac number, because 12556971 - 2¹ = 12556969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158910 + ... + 158988.

Almost surely, 2^12556971 is an apocalyptic number.

12556971 is a deficient number, since it is larger than the sum of its proper divisors (9740629).

12556971 is an equidigital number, since it uses as much as digits as its factorization.

12556971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 118 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 12556971 is about 3543.5816626684. The cubic root of 12556971 is about 232.4314886585.

The spelling of 12556971 in words is "twelve million, five hundred fifty-six thousand, nine hundred seventy-one".