129165025 has 12 divisors (see below), whose sum is σ = 174725424. Its totient is φ = 93938000.

The previous prime is 129165011. The next prime is 129165037. The reversal of 129165025 is 520561921.

It is not a de Polignac number, because 129165025 - 2⁷ = 129164897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234571 + ... + 235120.

It is an arithmetic number, because the mean of its divisors is an integer number (14560452).

Almost surely, 2^129165025 is an apocalyptic number.

It is an amenable number.

129165025 is a deficient number, since it is larger than the sum of its proper divisors (45560399).

129165025 is a wasteful number, since it uses less digits than its factorization.

129165025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469712 (or 469707 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 129165025 is about 11365.0791902212. The cubic root of 129165025 is about 505.4928039133.

The spelling of 129165025 in words is "one hundred twenty-nine million, one hundred sixty-five thousand, twenty-five".