12508139 has 8 divisors (see below), whose sum is σ = 14358240. Its totient is φ = 10673856.

The previous prime is 12508123. The next prime is 12508147. The reversal of 12508139 is 93180521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12508139 - 2⁴ = 12508123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12508169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2204 + ... + 5465.

It is an arithmetic number, because the mean of its divisors is an integer number (1794780).

Almost surely, 2^12508139 is an apocalyptic number.

12508139 is a deficient number, since it is larger than the sum of its proper divisors (1850101).

12508139 is an equidigital number, since it uses as much as digits as its factorization.

12508139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12508139 is about 3536.6847470477. The cubic root of 12508139 is about 232.1298012742.

The spelling of 12508139 in words is "twelve million, five hundred eight thousand, one hundred thirty-nine".