12657986 has 16 divisors (see below), whose sum is σ = 20774880. Its totient is φ = 5736480.

The previous prime is 12657977. The next prime is 12657991. The reversal of 12657986 is 68975621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9425 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (1298430).

Almost surely, 2^12657986 is an apocalyptic number.

12657986 is a deficient number, since it is larger than the sum of its proper divisors (8116894).

12657986 is a wasteful number, since it uses less digits than its factorization.

12657986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its digits is 181440, while the sum is 44.

The square root of 12657986 is about 3557.8063466130. The cubic root of 12657986 is about 233.0530925816.

The spelling of 12657986 in words is "twelve million, six hundred fifty-seven thousand, nine hundred eighty-six".