129407424 has 56 divisors (see below), whose sum is σ = 346283280. Its totient is φ = 42645504.

The previous prime is 129407393. The next prime is 129407431. The reversal of 129407424 is 424704921.

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, 13302 + ... + 20874.

It is an arithmetic number, because the mean of its divisors is an integer number (6183630).

Almost surely, 2^129407424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129407424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173141640).

129407424 is an abundant number, since it is smaller than the sum of its proper divisors (216875856).

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

129407424 is an equidigital number, since it uses as much as digits as its factorization.

129407424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677 (or 7667 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 129407424 is about 11375.7383936165. The cubic root of 129407424 is about 505.8088192337.

The spelling of 129407424 in words is "one hundred twenty-nine million, four hundred seven thousand, four hundred twenty-four".