12139375 has 10 divisors (see below), whose sum is σ = 15170144. Its totient is φ = 9711000.

The previous prime is 12139349. The next prime is 12139381. The reversal of 12139375 is 57393121.

It is not a de Polignac number, because 12139375 - 2⁷ = 12139247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9087 + ... + 10336.

Almost surely, 2^12139375 is an apocalyptic number.

12139375 is a deficient number, since it is larger than the sum of its proper divisors (3030769).

12139375 is an frugal number, since it uses more digits than its factorization.

12139375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19443 (or 19428 counting only the distinct ones).

The product of its digits is 5670, while the sum is 31.

The square root of 12139375 is about 3484.1605875734. The cubic root of 12139375 is about 229.8257975186.

The spelling of 12139375 in words is "twelve million, one hundred thirty-nine thousand, three hundred seventy-five".