12656937 has 4 divisors (see below), whose sum is σ = 16875920. Its totient is φ = 8437956.

The previous prime is 12656933. The next prime is 12656939. The reversal of 12656937 is 73965621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73965621 = 3 ⋅24655207.

It is not a de Polignac number, because 12656937 - 2² = 12656933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12656895 and 12656904.

It is not an unprimeable number, because it can be changed into a prime (12656933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109487 + ... + 2109492.

It is an arithmetic number, because the mean of its divisors is an integer number (4218980).

Almost surely, 2^12656937 is an apocalyptic number.

It is an amenable number.

12656937 is a deficient number, since it is larger than the sum of its proper divisors (4218983).

12656937 is an equidigital number, since it uses as much as digits as its factorization.

12656937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218982.

The product of its digits is 68040, while the sum is 39.

The square root of 12656937 is about 3557.6589212571. The cubic root of 12656937 is about 233.0466544998.

The spelling of 12656937 in words is "twelve million, six hundred fifty-six thousand, nine hundred thirty-seven".