12875138 has 4 divisors (see below), whose sum is σ = 19312710. Its totient is φ = 6437568.

The previous prime is 12875129. The next prime is 12875167. The reversal of 12875138 is 83157821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 37249 = 3583^2 + 193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12875098 and 12875107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218783 + ... + 3218786.

Almost surely, 2^12875138 is an apocalyptic number.

12875138 is a deficient number, since it is larger than the sum of its proper divisors (6437572).

12875138 is an equidigital number, since it uses as much as digits as its factorization.

12875138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437571.

The product of its digits is 13440, while the sum is 35.

The square root of 12875138 is about 3588.1942533815. The cubic root of 12875138 is about 234.3782447669.

The spelling of 12875138 in words is "twelve million, eight hundred seventy-five thousand, one hundred thirty-eight".