12857679 has 6 divisors (see below), whose sum is σ = 18572216. Its totient is φ = 8571780.

The previous prime is 12857659. The next prime is 12857711. The reversal of 12857679 is 97675821.

12857679 is a `hidden beast` number, since 1 + 2 + 8 + 576 + 79 = 666.

It is not a de Polignac number, because 12857679 - 2²⁰ = 11809103 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 (12857609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714307 + ... + 714324.

Almost surely, 2^12857679 is an apocalyptic number.

12857679 is a deficient number, since it is larger than the sum of its proper divisors (5714537).

12857679 is a wasteful number, since it uses less digits than its factorization.

12857679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428637 (or 1428634 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 12857679 is about 3585.7605887733. The cubic root of 12857679 is about 234.2722559796.

The spelling of 12857679 in words is "twelve million, eight hundred fifty-seven thousand, six hundred seventy-nine".