125912779 has 2 divisors, whose sum is σ = 125912780. Its totient is φ = 125912778.

The previous prime is 125912719. The next prime is 125912819. The reversal of 125912779 is 977219521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125912779 - 2⁷ = 125912651 is a prime.

It is not a weakly prime, because it can be changed into another prime (125912719) 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 as a sum of consecutive naturals, namely, 62956389 + 62956390.

It is an arithmetic number, because the mean of its divisors is an integer number (62956390).

Almost surely, 2^125912779 is an apocalyptic number.

125912779 is a deficient number, since it is larger than the sum of its proper divisors (1).

125912779 is an equidigital number, since it uses as much as digits as its factorization.

125912779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 125912779 is about 11221.0863556075. The cubic root of 125912779 is about 501.2140882600.

The spelling of 125912779 in words is "one hundred twenty-five million, nine hundred twelve thousand, seven hundred seventy-nine".