12656929 has 4 divisors (see below), whose sum is σ = 12668976. Its totient is φ = 12644884.

The previous prime is 12656927. The next prime is 12656933. The reversal of 12656929 is 92965621.

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.

It is a cyclic number.

It is not a de Polignac number, because 12656929 - 2¹ = 12656927 is a prime.

It is a super-2 number, since 2×12656929² = 320395703422082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12656891 and 12656900.

It is not an unprimeable number, because it can be changed into a prime (12656927) 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 3 ways as a sum of consecutive naturals, for example, 4279 + ... + 6604.

It is an arithmetic number, because the mean of its divisors is an integer number (3167244).

Almost surely, 2^12656929 is an apocalyptic number.

It is an amenable number.

12656929 is a deficient number, since it is larger than the sum of its proper divisors (12047).

12656929 is a wasteful number, since it uses less digits than its factorization.

12656929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12046.

The product of its digits is 58320, while the sum is 40.

The square root of 12656929 is about 3557.6577969220. The cubic root of 12656929 is about 233.0466053997.

The spelling of 12656929 in words is "twelve million, six hundred fifty-six thousand, nine hundred twenty-nine".