129032560 has 40 divisors (see below), whose sum is σ = 304239456. Its totient is φ = 50883840.

The previous prime is 129032557. The next prime is 129032573. The reversal of 129032560 is 65230921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5679 + ... + 17038.

Almost surely, 2^129032560 is an apocalyptic number.

129032560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129032560 is the 5680-th decagonal number.

It is an amenable number.

129032560 is an abundant number, since it is smaller than the sum of its proper divisors (175206896).

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

129032560 is a wasteful number, since it uses less digits than its factorization.

129032560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801 (or 22795 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 129032560 is about 11359.2499752404. The cubic root of 129032560 is about 505.3199423418.

The spelling of 129032560 in words is "one hundred twenty-nine million, thirty-two thousand, five hundred sixty".