129344172 has 96 divisors (see below), whose sum is σ = 331161600. Its totient is φ = 39154752.

The previous prime is 129344099. The next prime is 129344209. The reversal of 129344172 is 271443921.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 774433 + ... + 774599.

It is an arithmetic number, because the mean of its divisors is an integer number (3449600).

Almost surely, 2^129344172 is an apocalyptic number.

129344172 is a gapful number since it is divisible by the number (12) 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 129344172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165580800).

129344172 is an abundant number, since it is smaller than the sum of its proper divisors (201817428).

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

129344172 is a wasteful number, since it uses less digits than its factorization.

129344172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 129344172 is about 11372.9579265906. The cubic root of 129344172 is about 505.7263957465.

The spelling of 129344172 in words is "one hundred twenty-nine million, three hundred forty-four thousand, one hundred seventy-two".