129325720 has 32 divisors (see below), whose sum is σ = 291308400. Its totient is φ = 51672448.

The previous prime is 129325663. The next prime is 129325733. The reversal of 129325720 is 27523921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63762 + ... + 65758.

Almost surely, 2^129325720 is an apocalyptic number.

129325720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129325720 is an abundant number, since it is smaller than the sum of its proper divisors (161982680).

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

129325720 is a wasteful number, since it uses less digits than its factorization.

129325720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627 (or 3623 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 129325720 is about 11372.1466751005. The cubic root of 129325720 is about 505.7023459392.

The spelling of 129325720 in words is "one hundred twenty-nine million, three hundred twenty-five thousand, seven hundred twenty".