12564963 has 20 divisors (see below), whose sum is σ = 19085088. Its totient is φ = 8236080.

The previous prime is 12564961. The next prime is 12564967. The reversal of 12564963 is 36946521.

It is a happy number.

12564963 is a `hidden beast` number, since 1 + 2 + 5 + 649 + 6 + 3 = 666.

It is not a de Polignac number, because 12564963 - 2¹ = 12564961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12564961) by changing a digit.

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

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3670 + ... + 6212.

Almost surely, 2^12564963 is an apocalyptic number.

12564963 is a deficient number, since it is larger than the sum of its proper divisors (6520125).

12564963 is an equidigital number, since it uses as much as digits as its factorization.

12564963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616 (or 2607 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 12564963 is about 3544.7091559111. The cubic root of 12564963 is about 232.4807892556.

The spelling of 12564963 in words is "twelve million, five hundred sixty-four thousand, nine hundred sixty-three".