12856929 has 4 divisors (see below), whose sum is σ = 17142576. Its totient is φ = 8571284.

The previous prime is 12856891. The next prime is 12856933. The reversal of 12856929 is 92965821.

12856929 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12856929 - 2¹⁶ = 12791393 is a prime.

It is a super-2 number, since 2×12856929² = 330601246622082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12856969) 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, 2142819 + ... + 2142824.

It is an arithmetic number, because the mean of its divisors is an integer number (4285644).

Almost surely, 2^12856929 is an apocalyptic number.

It is an amenable number.

12856929 is a deficient number, since it is larger than the sum of its proper divisors (4285647).

12856929 is an equidigital number, since it uses as much as digits as its factorization.

12856929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285646.

The product of its digits is 77760, while the sum is 42.

The square root of 12856929 is about 3585.6560069254. The cubic root of 12856929 is about 234.2677007871.

The spelling of 12856929 in words is "twelve million, eight hundred fifty-six thousand, nine hundred twenty-nine".