126709139 has 8 divisors (see below), whose sum is σ = 134387232. Its totient is φ = 119211840.

The previous prime is 126709123. The next prime is 126709151. The reversal of 126709139 is 931907621.

It is a happy number.

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 126709139 - 2⁴ = 126709123 is a prime.

It is a super-2 number, since 2×126709139² = 32110411812242642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126709159) 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, 43754 + ... + 46559.

It is an arithmetic number, because the mean of its divisors is an integer number (16798404).

Almost surely, 2^126709139 is an apocalyptic number.

126709139 is a deficient number, since it is larger than the sum of its proper divisors (7678093).

126709139 is an equidigital number, since it uses as much as digits as its factorization.

126709139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90397.

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

The square root of 126709139 is about 11256.5154022015. The cubic root of 126709139 is about 502.2685438515.

The spelling of 126709139 in words is "one hundred twenty-six million, seven hundred nine thousand, one hundred thirty-nine".