129005874 has 12 divisors (see below), whose sum is σ = 279512766. Its totient is φ = 43001952.

The previous prime is 129005867. The next prime is 129005909. The reversal of 129005874 is 478500921.

It can be written as a sum of positive squares in only one way, i.e., 128663649 + 342225 = 11343^2 + 585^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3583479 + ... + 3583514.

Almost surely, 2^129005874 is an apocalyptic number.

129005874 is an abundant number, since it is smaller than the sum of its proper divisors (150506892).

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

129005874 is a wasteful number, since it uses less digits than its factorization.

129005874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167001 (or 7166998 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 129005874 is about 11358.0752770881. The cubic root of 129005874 is about 505.2851038542.

The spelling of 129005874 in words is "one hundred twenty-nine million, five thousand, eight hundred seventy-four".