129131874 has 16 divisors (see below), whose sum is σ = 286959840. Its totient is φ = 43043940.

The previous prime is 129131869. The next prime is 129131879. The reversal of 129131874 is 478131921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129131869) and next prime (129131879).

It is not an unprimeable number, because it can be changed into a prime (129131879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195612 + ... + 1195719.

It is an arithmetic number, because the mean of its divisors is an integer number (17934990).

Almost surely, 2^129131874 is an apocalyptic number.

129131874 is an abundant number, since it is smaller than the sum of its proper divisors (157827966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129131874 is a wasteful number, since it uses less digits than its factorization.

129131874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391342 (or 2391336 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 129131874 is about 11363.6206378073. The cubic root of 129131874 is about 505.4495542648.

The spelling of 129131874 in words is "one hundred twenty-nine million, one hundred thirty-one thousand, eight hundred seventy-four".