129520485 has 64 divisors (see below), whose sum is σ = 238464000. Its totient is φ = 66663936.

The previous prime is 129520483. The next prime is 129520529. The reversal of 129520485 is 584025921.

129520485 is a `hidden beast` number, since 129 + 52 + 0 + 485 = 666.

It is not a de Polignac number, because 129520485 - 2¹ = 129520483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129520483) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 869191 + ... + 869339.

It is an arithmetic number, because the mean of its divisors is an integer number (3726000).

Almost surely, 2^129520485 is an apocalyptic number.

129520485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129520485 is a deficient number, since it is larger than the sum of its proper divisors (108943515).

129520485 is a wasteful number, since it uses less digits than its factorization.

129520485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 129520485 is about 11380.7067003767. The cubic root of 129520485 is about 505.9560817908.

The spelling of 129520485 in words is "one hundred twenty-nine million, five hundred twenty thousand, four hundred eighty-five".