12687645 has 16 divisors (see below), whose sum is σ = 21000960. Its totient is φ = 6533184.

The previous prime is 12687613. The next prime is 12687659. The reversal of 12687645 is 54678621.

It is not a de Polignac number, because 12687645 - 2⁵ = 12687613 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 14149 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (1312560).

Almost surely, 2^12687645 is an apocalyptic number.

12687645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12687645 is a deficient number, since it is larger than the sum of its proper divisors (8313315).

12687645 is a wasteful number, since it uses less digits than its factorization.

12687645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29204.

The product of its digits is 80640, while the sum is 39.

The square root of 12687645 is about 3561.9720661454. The cubic root of 12687645 is about 233.2349732821.

The spelling of 12687645 in words is "twelve million, six hundred eighty-seven thousand, six hundred forty-five".