129569242 has 16 divisors (see below), whose sum is σ = 212209632. Its totient is φ = 58843120.

The previous prime is 129569213. The next prime is 129569263. The reversal of 129569242 is 242965921.

It is a junction number, because it is equal to n+sod(n) for n = 129569195 and 129569204.

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, 34908 + ... + 38440.

It is an arithmetic number, because the mean of its divisors is an integer number (13263102).

Almost surely, 2^129569242 is an apocalyptic number.

129569242 is a deficient number, since it is larger than the sum of its proper divisors (82640390).

129569242 is a wasteful number, since it uses less digits than its factorization.

129569242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5213.

The product of its digits is 77760, while the sum is 40.

The square root of 129569242 is about 11382.8485889956. The cubic root of 129569242 is about 506.0195615970.

The spelling of 129569242 in words is "one hundred twenty-nine million, five hundred sixty-nine thousand, two hundred forty-two".