12706139 has 2 divisors, whose sum is σ = 12706140. Its totient is φ = 12706138.

The previous prime is 12706093. The next prime is 12706151. The reversal of 12706139 is 93160721.

12706139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12706139 - 2⁸ = 12705883 is a prime.

It is a super-2 number, since 2×12706139² = 322891936574642, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12706159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6353069 + 6353070.

It is an arithmetic number, because the mean of its divisors is an integer number (6353070).

Almost surely, 2^12706139 is an apocalyptic number.

12706139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12706139 is an equidigital number, since it uses as much as digits as its factorization.

12706139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 12706139 is about 3564.5671546487. The cubic root of 12706139 is about 233.3482423580.

The spelling of 12706139 in words is "twelve million, seven hundred six thousand, one hundred thirty-nine".