129145924 has 12 divisors (see below), whose sum is σ = 226993900. Its totient is φ = 64290528.

The previous prime is 129145909. The next prime is 129145949. The reversal of 129145924 is 429541921.

It can be written as a sum of positive squares in 2 ways, for example, as 92929600 + 36216324 = 9640^2 + 6018^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69579 + ... + 71410.

Almost surely, 2^129145924 is an apocalyptic number.

It is an amenable number.

129145924 is a deficient number, since it is larger than the sum of its proper divisors (97847976).

129145924 is a wasteful number, since it uses less digits than its factorization.

129145924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141222 (or 141220 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 129145924 is about 11364.2388218481. The cubic root of 129145924 is about 505.4678851603.

The spelling of 129145924 in words is "one hundred twenty-nine million, one hundred forty-five thousand, nine hundred twenty-four".