129295885 has 16 divisors (see below), whose sum is σ = 163192320. Its totient is φ = 98205120.

The previous prime is 129295877. The next prime is 129295889. The reversal of 129295885 is 588592921.

It is not a de Polignac number, because 129295885 - 2³ = 129295877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129295889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346 + ... + 16084.

It is an arithmetic number, because the mean of its divisors is an integer number (10199520).

Almost surely, 2^129295885 is an apocalyptic number.

It is an amenable number.

129295885 is a deficient number, since it is larger than the sum of its proper divisors (33896435).

129295885 is a wasteful number, since it uses less digits than its factorization.

129295885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15828.

The product of its digits is 518400, while the sum is 49.

The square root of 129295885 is about 11370.8348418223. The cubic root of 129295885 is about 505.6634550162.

The spelling of 129295885 in words is "one hundred twenty-nine million, two hundred ninety-five thousand, eight hundred eighty-five".