126117139 has 2 divisors, whose sum is σ = 126117140. Its totient is φ = 126117138.

The previous prime is 126117133. The next prime is 126117149. The reversal of 126117139 is 931711621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126117139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126117139.

It is not a weakly prime, because it can be changed into another prime (126117133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63058569 + 63058570.

It is an arithmetic number, because the mean of its divisors is an integer number (63058570).

Almost surely, 2^126117139 is an apocalyptic number.

126117139 is a deficient number, since it is larger than the sum of its proper divisors (1).

126117139 is an equidigital number, since it uses as much as digits as its factorization.

126117139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 31.

The square root of 126117139 is about 11230.1887339439. The cubic root of 126117139 is about 501.4851032362.

The spelling of 126117139 in words is "one hundred twenty-six million, one hundred seventeen thousand, one hundred thirty-nine".