12939975 has 54 divisors (see below), whose sum is σ = 24744200. Its totient is φ = 6462720.

The previous prime is 12939967. The next prime is 12940001. The reversal of 12939975 is 57993921.

It is a happy number.

It is not a de Polignac number, because 12939975 - 2³ = 12939967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12939975.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 64926 + ... + 65124.

Almost surely, 2^12939975 is an apocalyptic number.

12939975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12939975 is a deficient number, since it is larger than the sum of its proper divisors (11804225).

12939975 is a wasteful number, since it uses less digits than its factorization.

12939975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 224 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 12939975 is about 3597.2176748148. The cubic root of 12939975 is about 234.7710158214.

It can be divided in two parts, 129 and 39975, that added together give a palindrome (40104).

The spelling of 12939975 in words is "twelve million, nine hundred thirty-nine thousand, nine hundred seventy-five".