129072044 has 12 divisors (see below), whose sum is σ = 235696944. Its totient is φ = 61730064.

The previous prime is 129072029. The next prime is 129072049. The reversal of 129072044 is 440270921.

It is a junction number, because it is equal to n+sod(n) for n = 129071998 and 129072016.

It is not an unprimeable number, because it can be changed into a prime (129072049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701387 + ... + 701570.

It is an arithmetic number, because the mean of its divisors is an integer number (19641412).

Almost surely, 2^129072044 is an apocalyptic number.

It is an amenable number.

129072044 is a deficient number, since it is larger than the sum of its proper divisors (106624900).

129072044 is a wasteful number, since it uses less digits than its factorization.

129072044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402984 (or 1402982 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 129072044 is about 11360.9878091652. The cubic root of 129072044 is about 505.3714797673.

The spelling of 129072044 in words is "one hundred twenty-nine million, seventy-two thousand, forty-four".