125999959 has 2 divisors, whose sum is σ = 125999960. Its totient is φ = 125999958.

The previous prime is 125999899. The next prime is 126000013. The reversal of 125999959 is 959999521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125999959 - 2²⁵ = 92445527 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 (125999059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62999979 + 62999980.

It is an arithmetic number, because the mean of its divisors is an integer number (62999980).

Almost surely, 2^125999959 is an apocalyptic number.

125999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

125999959 is an equidigital number, since it uses as much as digits as its factorization.

125999959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2952450, while the sum is 58.

The square root of 125999959 is about 11224.9703340365. The cubic root of 125999959 is about 501.3297391194.

The spelling of 125999959 in words is "one hundred twenty-five million, nine hundred ninety-nine thousand, nine hundred fifty-nine".