129140165 has 16 divisors (see below), whose sum is σ = 193207680. Its totient is φ = 80502720.

The previous prime is 129140153. The next prime is 129140197. The reversal of 129140165 is 561041921.

129140165 = 6560² + 6561² + 6562².

It is not a de Polignac number, because 129140165 - 2⁴ = 129140149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167330 + ... + 168099.

It is an arithmetic number, because the mean of its divisors is an integer number (12075480).

Almost surely, 2^129140165 is an apocalyptic number.

It is an amenable number.

129140165 is a deficient number, since it is larger than the sum of its proper divisors (64067515).

129140165 is a wasteful number, since it uses less digits than its factorization.

129140165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335452.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 129140165 is about 11363.9854364567. The cubic root of 129140165 is about 505.4603716110.

The spelling of 129140165 in words is "one hundred twenty-nine million, one hundred forty thousand, one hundred sixty-five".