129018522 has 16 divisors (see below), whose sum is σ = 259584192. Its totient is φ = 42748320.

The previous prime is 129018503. The next prime is 129018551. The reversal of 129018522 is 225810921.

It is a self number, because there is not a number n which added to its sum of digits gives 129018522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63379 + ... + 65382.

It is an arithmetic number, because the mean of its divisors is an integer number (16224012).

Almost surely, 2^129018522 is an apocalyptic number.

129018522 is an abundant number, since it is smaller than the sum of its proper divisors (130565670).

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

129018522 is a wasteful number, since it uses less digits than its factorization.

129018522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128933.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 129018522 is about 11358.6320479184. The cubic root of 129018522 is about 505.3016163766.

The spelling of 129018522 in words is "one hundred twenty-nine million, eighteen thousand, five hundred twenty-two".