129385025 has 24 divisors (see below), whose sum is σ = 200028864. Its totient is φ = 80654400.

The previous prime is 129385021. The next prime is 129385027. The reversal of 129385025 is 520583921.

It is not a de Polignac number, because 129385025 - 2² = 129385021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (129385021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31682 + ... + 35531.

It is an arithmetic number, because the mean of its divisors is an integer number (8334536).

Almost surely, 2^129385025 is an apocalyptic number.

It is an amenable number.

129385025 is a deficient number, since it is larger than the sum of its proper divisors (70643839).

129385025 is a wasteful number, since it uses less digits than its factorization.

129385025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67241 (or 67236 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 129385025 is about 11374.7538434904. The cubic root of 129385025 is about 505.7796342376.

The spelling of 129385025 in words is "one hundred twenty-nine million, three hundred eighty-five thousand, twenty-five".