129565038 has 16 divisors (see below), whose sum is σ = 259347456. Its totient is φ = 43152120.

The previous prime is 129565021. The next prime is 129565057. The reversal of 129565038 is 830565921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129564987 and 129565005.

It is a congruent number.

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, 718 + ... + 16113.

It is an arithmetic number, because the mean of its divisors is an integer number (16209216).

Almost surely, 2^129565038 is an apocalyptic number.

129565038 is an abundant number, since it is smaller than the sum of its proper divisors (129782418).

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

129565038 is a wasteful number, since it uses less digits than its factorization.

129565038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18119.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 129565038 is about 11382.6639237043. The cubic root of 129565038 is about 506.0140887723.

The spelling of 129565038 in words is "one hundred twenty-nine million, five hundred sixty-five thousand, thirty-eight".