129020424 has 32 divisors (see below), whose sum is σ = 347363520. Its totient is φ = 39698496.

The previous prime is 129020417. The next prime is 129020447. The reversal of 129020424 is 424020921.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 129020394 and 129020403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206452 + ... + 207075.

It is an arithmetic number, because the mean of its divisors is an integer number (10855110).

Almost surely, 2^129020424 is an apocalyptic number.

It is an amenable number.

129020424 is an abundant number, since it is smaller than the sum of its proper divisors (218343096).

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

129020424 is a wasteful number, since it uses less digits than its factorization.

129020424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413549 (or 413545 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 129020424 is about 11358.7157724806. The cubic root of 129020424 is about 505.3040994282.

The spelling of 129020424 in words is "one hundred twenty-nine million, twenty thousand, four hundred twenty-four".