129520710 has 48 divisors (see below), whose sum is σ = 367370640. Its totient is φ = 31398720.

The previous prime is 129520709. The next prime is 129520717. The reversal of 129520710 is 17025921.

129520710 is a `hidden beast` number, since 129 + 520 + 7 + 10 = 666.

It is a super-2 number, since 2×129520710² = 33551228637808200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129520717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64425 + ... + 66404.

It is an arithmetic number, because the mean of its divisors is an integer number (7653555).

Almost surely, 2^129520710 is an apocalyptic number.

129520710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129520710 is an abundant number, since it is smaller than the sum of its proper divisors (237849930).

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

129520710 is a wasteful number, since it uses less digits than its factorization.

129520710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130853 (or 130850 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 129520710 is about 11380.7165855231. The cubic root of 129520710 is about 505.9563747690.

The spelling of 129520710 in words is "one hundred twenty-nine million, five hundred twenty thousand, seven hundred ten".