12564971 has 2 divisors, whose sum is σ = 12564972. Its totient is φ = 12564970.

The previous prime is 12564967. The next prime is 12564973. The reversal of 12564971 is 17946521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12564971 - 2² = 12564967 is a prime.

It is a Sophie Germain prime.

Together with 12564973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12564973) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282485 + 6282486.

It is an arithmetic number, because the mean of its divisors is an integer number (6282486).

Almost surely, 2^12564971 is an apocalyptic number.

12564971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564971 is an equidigital number, since it uses as much as digits as its factorization.

12564971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 12564971 is about 3544.7102843533. The cubic root of 12564971 is about 232.4808385951.

The spelling of 12564971 in words is "twelve million, five hundred sixty-four thousand, nine hundred seventy-one".