126126139 has 2 divisors, whose sum is σ = 126126140. Its totient is φ = 126126138.

The previous prime is 126126097. The next prime is 126126149. The reversal of 126126139 is 931621621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126126139 - 2⁹ = 126125627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126126139.

It is not a weakly prime, because it can be changed into another prime (126126149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63063069 + 63063070.

It is an arithmetic number, because the mean of its divisors is an integer number (63063070).

Almost surely, 2^126126139 is an apocalyptic number.

126126139 is a deficient number, since it is larger than the sum of its proper divisors (1).

126126139 is an equidigital number, since it uses as much as digits as its factorization.

126126139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 126126139 is about 11230.5894324385. The cubic root of 126126139 is about 501.4970319838.

The spelling of 126126139 in words is "one hundred twenty-six million, one hundred twenty-six thousand, one hundred thirty-nine".