12634865 has 16 divisors (see below), whose sum is σ = 15897600. Its totient is φ = 9627072.

The previous prime is 12634861. The next prime is 12634877. The reversal of 12634865 is 56843621.

It is not a de Polignac number, because 12634865 - 2² = 12634861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12634861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10904 + ... + 12006.

It is an arithmetic number, because the mean of its divisors is an integer number (993600).

Almost surely, 2^12634865 is an apocalyptic number.

It is an amenable number.

12634865 is a deficient number, since it is larger than the sum of its proper divisors (3262735).

12634865 is a wasteful number, since it uses less digits than its factorization.

12634865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its digits is 34560, while the sum is 35.

The square root of 12634865 is about 3554.5555277700. Note that the first 4 decimals coincide. The cubic root of 12634865 is about 232.9111083116.

The spelling of 12634865 in words is "twelve million, six hundred thirty-four thousand, eight hundred sixty-five".