12556645 has 8 divisors (see below), whose sum is σ = 15418656. Its totient is φ = 9811536.

The previous prime is 12556639. The next prime is 12556669. The reversal of 12556645 is 54665521.

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 12556645 - 2³ = 12556637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12556645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28987 + ... + 29416.

It is an arithmetic number, because the mean of its divisors is an integer number (1927332).

Almost surely, 2^12556645 is an apocalyptic number.

It is an amenable number.

12556645 is a deficient number, since it is larger than the sum of its proper divisors (2862011).

12556645 is an equidigital number, since it uses as much as digits as its factorization.

12556645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58451.

The product of its digits is 36000, while the sum is 34.

The square root of 12556645 is about 3543.5356637122. The cubic root of 12556645 is about 232.4294772042.

The spelling of 12556645 in words is "twelve million, five hundred fifty-six thousand, six hundred forty-five".