12631865 has 8 divisors (see below), whose sum is σ = 15956160. Its totient is φ = 9573552.

The previous prime is 12631831. The next prime is 12631873. The reversal of 12631865 is 56813621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12631865 - 2⁸ = 12631609 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66389 + ... + 66578.

It is an arithmetic number, because the mean of its divisors is an integer number (1994520).

Almost surely, 2^12631865 is an apocalyptic number.

It is an amenable number.

12631865 is a deficient number, since it is larger than the sum of its proper divisors (3324295).

12631865 is a wasteful number, since it uses less digits than its factorization.

12631865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132991.

The product of its digits is 8640, while the sum is 32.

The square root of 12631865 is about 3554.1335090286. The cubic root of 12631865 is about 232.8926728519.

The spelling of 12631865 in words is "twelve million, six hundred thirty-one thousand, eight hundred sixty-five".