129255425 has 18 divisors (see below), whose sum is σ = 173559762. Its totient is φ = 95447040.

The previous prime is 129255419. The next prime is 129255481. The reversal of 129255425 is 524552921.

It can be written as a sum of positive squares in 9 ways, for example, as 70946929 + 58308496 = 8423^2 + 7636^2 .

It is not a de Polignac number, because 129255425 - 2⁴ = 129255409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11072 + ... + 19521.

It is an arithmetic number, because the mean of its divisors is an integer number (9642209).

Almost surely, 2^129255425 is an apocalyptic number.

It is an amenable number.

129255425 is a deficient number, since it is larger than the sum of its proper divisors (44304337).

129255425 is a wasteful number, since it uses less digits than its factorization.

129255425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30629 (or 30611 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 129255425 is about 11369.0555896257. The cubic root of 129255425 is about 505.6107044902.

The spelling of 129255425 in words is "one hundred twenty-nine million, two hundred fifty-five thousand, four hundred twenty-five".