129395425 has 18 divisors (see below), whose sum is σ = 163022118. Its totient is φ = 101882880.

The previous prime is 129395411. The next prime is 129395459. The reversal of 129395425 is 524593921.

It can be written as a sum of positive squares in 3 ways, for example, as 20151121 + 109244304 = 4489^2 + 10452^2 .

It is not a de Polignac number, because 129395425 - 2²⁵ = 95840993 is a prime.

It is a Duffinian 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, 111649 + ... + 112801.

Almost surely, 2^129395425 is an apocalyptic number.

It is an amenable number.

129395425 is a deficient number, since it is larger than the sum of its proper divisors (33626693).

129395425 is an equidigital number, since it uses as much as digits as its factorization.

129395425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1225 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 129395425 is about 11375.2109870543. The cubic root of 129395425 is about 505.7931854382.

The spelling of 129395425 in words is "one hundred twenty-nine million, three hundred ninety-five thousand, four hundred twenty-five".