129959425 has 6 divisors (see below), whose sum is σ = 161149718. Its totient is φ = 103967520.

The previous prime is 129959393. The next prime is 129959437. The reversal of 129959425 is 524959921.

It can be written as a sum of positive squares in 3 ways, for example, as 1635841 + 128323584 = 1279^2 + 11328^2 .

It is not a de Polignac number, because 129959425 - 2⁵ = 129959393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 2599164 + ... + 2599213.

Almost surely, 2^129959425 is an apocalyptic number.

It is an amenable number.

129959425 is a deficient number, since it is larger than the sum of its proper divisors (31190293).

129959425 is an equidigital number, since it uses as much as digits as its factorization.

129959425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5198387 (or 5198382 counting only the distinct ones).

The product of its digits is 291600, while the sum is 46.

The square root of 129959425 is about 11399.9747806739. The cubic root of 129959425 is about 506.5269926531.

The spelling of 129959425 in words is "one hundred twenty-nine million, nine hundred fifty-nine thousand, four hundred twenty-five".