129960520 has 16 divisors (see below), whose sum is σ = 292411260. Its totient is φ = 51984192.

The previous prime is 129960517. The next prime is 129960553. The reversal of 129960520 is 25069921.

It can be written as a sum of positive squares in 2 ways, for example, as 104980516 + 24980004 = 10246^2 + 4998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624467 + ... + 1624546.

Almost surely, 2^129960520 is an apocalyptic number.

129960520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129960520 is an abundant number, since it is smaller than the sum of its proper divisors (162450740).

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

129960520 is a wasteful number, since it uses less digits than its factorization.

129960520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249024 (or 3249020 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 129960520 is about 11400.0228069947. The cubic root of 129960520 is about 506.5284152651.

The spelling of 129960520 in words is "one hundred twenty-nine million, nine hundred sixty thousand, five hundred twenty".