12564427 has 2 divisors, whose sum is σ = 12564428. Its totient is φ = 12564426.

The previous prime is 12564421. The next prime is 12564439. The reversal of 12564427 is 72446521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12564427 - 2¹¹ = 12562379 is a prime.

It is not a weakly prime, because it can be changed into another prime (12564421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282213 + 6282214.

It is an arithmetic number, because the mean of its divisors is an integer number (6282214).

Almost surely, 2^12564427 is an apocalyptic number.

12564427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564427 is an equidigital number, since it uses as much as digits as its factorization.

12564427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 12564427 is about 3544.6335494660. The cubic root of 12564427 is about 232.4774834633.

The spelling of 12564427 in words is "twelve million, five hundred sixty-four thousand, four hundred twenty-seven".