129070520 has 32 divisors (see below), whose sum is σ = 297166320. Its totient is φ = 50426880.

The previous prime is 129070517. The next prime is 129070531. The reversal of 129070520 is 25070921.

It is a self number, because there is not a number n which added to its sum of digits gives 129070520.

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, 35801 + ... + 39240.

Almost surely, 2^129070520 is an apocalyptic number.

129070520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129070520 is an abundant number, since it is smaller than the sum of its proper divisors (168095800).

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

129070520 is a wasteful number, since it uses less digits than its factorization.

129070520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75095 (or 75091 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 129070520 is about 11360.9207373346. The cubic root of 129070520 is about 505.3694907252.

The spelling of 129070520 in words is "one hundred twenty-nine million, seventy thousand, five hundred twenty".