12978625 has 16 divisors (see below), whose sum is σ = 17671680. Its totient is φ = 9438000.

The previous prime is 12978619. The next prime is 12978629. The reversal of 12978625 is 52687921.

It is not a de Polignac number, because 12978625 - 2³ = 12978617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978629) 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, 3345 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (1104480).

Almost surely, 2^12978625 is an apocalyptic number.

It is an amenable number.

12978625 is a deficient number, since it is larger than the sum of its proper divisors (4693055).

12978625 is an equidigital number, since it uses as much as digits as its factorization.

12978625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9465 (or 9455 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 12978625 is about 3602.5858768390. The cubic root of 12978625 is about 235.0045268481.

The spelling of 12978625 in words is "twelve million, nine hundred seventy-eight thousand, six hundred twenty-five".