12657687 has 16 divisors (see below), whose sum is σ = 19345920. Its totient is φ = 7211232.

The previous prime is 12657637. The next prime is 12657691. The reversal of 12657687 is 78675621.

It is not a de Polignac number, because 12657687 - 2⁷ = 12657559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8533 + ... + 9905.

It is an arithmetic number, because the mean of its divisors is an integer number (1209120).

Almost surely, 2^12657687 is an apocalyptic number.

12657687 is a deficient number, since it is larger than the sum of its proper divisors (6688233).

12657687 is a wasteful number, since it uses less digits than its factorization.

12657687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its digits is 141120, while the sum is 42.

The square root of 12657687 is about 3557.7643260902. The cubic root of 12657687 is about 233.0512575498.

The spelling of 12657687 in words is "twelve million, six hundred fifty-seven thousand, six hundred eighty-seven".