125199959 has 2 divisors, whose sum is σ = 125199960. Its totient is φ = 125199958.

The previous prime is 125199923. The next prime is 125199973. The reversal of 125199959 is 959991521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125199959 - 2²⁰ = 124151383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125199859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62599979 + 62599980.

It is an arithmetic number, because the mean of its divisors is an integer number (62599980).

Almost surely, 2^125199959 is an apocalyptic number.

125199959 is a deficient number, since it is larger than the sum of its proper divisors (1).

125199959 is an equidigital number, since it uses as much as digits as its factorization.

125199959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 328050, while the sum is 50.

The square root of 125199959 is about 11189.2787524487. The cubic root of 125199959 is about 500.2664699623.

The spelling of 125199959 in words is "one hundred twenty-five million, one hundred ninety-nine thousand, nine hundred fifty-nine".