12870657 has 20 divisors (see below), whose sum is σ = 20240880. Its totient is φ = 8127864.

The previous prime is 12870653. The next prime is 12870661. The reversal of 12870657 is 75607821.

It is an interprime number because it is at equal distance from previous prime (12870653) and next prime (12870661).

It is not a de Polignac number, because 12870657 - 2² = 12870653 is a prime.

It is a super-2 number, since 2×12870657² = 331307623223298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12870653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2643 + ... + 5720.

It is an arithmetic number, because the mean of its divisors is an integer number (1012044).

Almost surely, 2^12870657 is an apocalyptic number.

It is an amenable number.

12870657 is a deficient number, since it is larger than the sum of its proper divisors (7370223).

12870657 is an equidigital number, since it uses as much as digits as its factorization.

12870657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394 (or 8385 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12870657 is about 3587.5697902619. The cubic root of 12870657 is about 234.3510509929.

The spelling of 12870657 in words is "twelve million, eight hundred seventy thousand, six hundred fifty-seven".