12912845 has 16 divisors (see below), whose sum is σ = 16975872. Its totient is φ = 9351360.

The previous prime is 12912773. The next prime is 12912847. The reversal of 12912845 is 54821921.

It is not a de Polignac number, because 12912845 - 2⁸ = 12912589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12912847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20759 + ... + 21371.

It is an arithmetic number, because the mean of its divisors is an integer number (1060992).

Almost surely, 2^12912845 is an apocalyptic number.

It is an amenable number.

12912845 is a deficient number, since it is larger than the sum of its proper divisors (4063027).

12912845 is a wasteful number, since it uses less digits than its factorization.

12912845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

The product of its digits is 5760, while the sum is 32.

The square root of 12912845 is about 3593.4447261646. Note that the first 3 decimals coincide. The cubic root of 12912845 is about 234.6068270916.

The spelling of 12912845 in words is "twelve million, nine hundred twelve thousand, eight hundred forty-five".