129320512 has 28 divisors (see below), whose sum is σ = 265473180. Its totient is φ = 62429696.

The previous prime is 129320509. The next prime is 129320533. The reversal of 129320512 is 215023921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23970816 + 105349696 = 4896^2 + 10264^2 .

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, 32983 + ... + 36694.

It is an arithmetic number, because the mean of its divisors is an integer number (9481185).

Almost surely, 2^129320512 is an apocalyptic number.

It is an amenable number.

129320512 is an abundant number, since it is smaller than the sum of its proper divisors (136152668).

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

129320512 is an equidigital number, since it uses as much as digits as its factorization.

129320512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69718 (or 69708 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 129320512 is about 11371.9176922804. The cubic root of 129320512 is about 505.6955575675.

The spelling of 129320512 in words is "one hundred twenty-nine million, three hundred twenty thousand, five hundred twelve".