12918925 has 6 divisors (see below), whose sum is σ = 16019498. Its totient is φ = 10335120.

The previous prime is 12918923. The next prime is 12918931. The reversal of 12918925 is 52981921.

It can be written as a sum of positive squares in 3 ways, for example, as 2920681 + 9998244 = 1709^2 + 3162^2 .

It is not a de Polignac number, because 12918925 - 2¹ = 12918923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258354 + ... + 258403.

Almost surely, 2^12918925 is an apocalyptic number.

It is an amenable number.

12918925 is a deficient number, since it is larger than the sum of its proper divisors (3100573).

12918925 is an equidigital number, since it uses as much as digits as its factorization.

12918925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516767 (or 516762 counting only the distinct ones).

The product of its digits is 12960, while the sum is 37.

The square root of 12918925 is about 3594.2906115115. The cubic root of 12918925 is about 234.6436427764.

The spelling of 12918925 in words is "twelve million, nine hundred eighteen thousand, nine hundred twenty-five".