12697139 has 12 divisors (see below), whose sum is σ = 15714576. Its totient is φ = 10045152.

The previous prime is 12697133. The next prime is 12697141. The reversal of 12697139 is 93179621.

It is a happy number.

It is not a de Polignac number, because 12697139 - 2⁴ = 12697123 is a prime.

It is a super-2 number, since 2×12697139² = 322434677570642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12697133) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4184 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (1309548).

Almost surely, 2^12697139 is an apocalyptic number.

12697139 is a deficient number, since it is larger than the sum of its proper divisors (3017437).

12697139 is a wasteful number, since it uses less digits than its factorization.

12697139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766 (or 10753 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 12697139 is about 3563.3045056520. The cubic root of 12697139 is about 233.2931343447.

The spelling of 12697139 in words is "twelve million, six hundred ninety-seven thousand, one hundred thirty-nine".