129472120 has 64 divisors (see below), whose sum is σ = 302826240. Its totient is φ = 49766400.

The previous prime is 129472111. The next prime is 129472159. The reversal of 129472120 is 21274921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239050 + ... + 239590.

It is an arithmetic number, because the mean of its divisors is an integer number (4731660).

Almost surely, 2^129472120 is an apocalyptic number.

129472120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129472120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151413120).

129472120 is an abundant number, since it is smaller than the sum of its proper divisors (173354120).

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

129472120 is a wasteful number, since it uses less digits than its factorization.

129472120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 129472120 is about 11378.5816339296. The cubic root of 129472120 is about 505.8930966127.

The spelling of 129472120 in words is "one hundred twenty-nine million, four hundred seventy-two thousand, one hundred twenty".