12556879 has 2 divisors, whose sum is σ = 12556880. Its totient is φ = 12556878.

The previous prime is 12556877. The next prime is 12556933. The reversal of 12556879 is 97865521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12556879 - 2¹ = 12556877 is a prime.

Together with 12556877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12556877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6278439 + 6278440.

It is an arithmetic number, because the mean of its divisors is an integer number (6278440).

Almost surely, 2^12556879 is an apocalyptic number.

12556879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12556879 is an equidigital number, since it uses as much as digits as its factorization.

12556879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 12556879 is about 3543.5686814284. The cubic root of 12556879 is about 232.4309210124.

The spelling of 12556879 in words is "twelve million, five hundred fifty-six thousand, eight hundred seventy-nine".