129513760 has 24 divisors (see below), whose sum is σ = 305976636. Its totient is φ = 51805440.

The previous prime is 129513733. The next prime is 129513799. The reversal of 129513760 is 67315921.

It can be written as a sum of positive squares in 2 ways, for example, as 108243216 + 21270544 = 10404^2 + 4612^2 .

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, 404571 + ... + 404890.

Almost surely, 2^129513760 is an apocalyptic number.

129513760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129513760 is an abundant number, since it is smaller than the sum of its proper divisors (176462876).

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

129513760 is an equidigital number, since it uses as much as digits as its factorization.

129513760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809476 (or 809468 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 129513760 is about 11380.4112403726. The cubic root of 129513760 is about 505.9473248400.

The spelling of 129513760 in words is "one hundred twenty-nine million, five hundred thirteen thousand, seven hundred sixty".