12564667 has 2 divisors, whose sum is σ = 12564668. Its totient is φ = 12564666.

The previous prime is 12564637. The next prime is 12564679. The reversal of 12564667 is 76646521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12564667 - 2¹¹ = 12562619 is a prime.

It is not a weakly prime, because it can be changed into another prime (12564637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282333 + 6282334.

It is an arithmetic number, because the mean of its divisors is an integer number (6282334).

Almost surely, 2^12564667 is an apocalyptic number.

12564667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564667 is an equidigital number, since it uses as much as digits as its factorization.

12564667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 12564667 is about 3544.6674032975. The cubic root of 12564667 is about 232.4789636804.

It can be divided in two parts, 12564 and 667, that added together give a palindrome (13231).

The spelling of 12564667 in words is "twelve million, five hundred sixty-four thousand, six hundred sixty-seven".