125138879 has 2 divisors, whose sum is σ = 125138880. Its totient is φ = 125138878.

The previous prime is 125138873. The next prime is 125138917. The reversal of 125138879 is 978831521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125138879 - 2⁸ = 125138623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125138873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62569439 + 62569440.

It is an arithmetic number, because the mean of its divisors is an integer number (62569440).

Almost surely, 2^125138879 is an apocalyptic number.

125138879 is a deficient number, since it is larger than the sum of its proper divisors (1).

125138879 is an equidigital number, since it uses as much as digits as its factorization.

125138879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The square root of 125138879 is about 11186.5490210341. The cubic root of 125138879 is about 500.1851034650.

The spelling of 125138879 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, eight hundred seventy-nine".