129504912 has 80 divisors (see below), whose sum is σ = 372922560. Its totient is φ = 38486016.

The previous prime is 129504901. The next prime is 129505001. The reversal of 129504912 is 219405921.

It is a super-3 number, since 3×129504912³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11328 + ... + 19680.

It is an arithmetic number, because the mean of its divisors is an integer number (4661532).

Almost surely, 2^129504912 is an apocalyptic number.

129504912 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 129504912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186461280).

129504912 is an abundant number, since it is smaller than the sum of its proper divisors (243417648).

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

129504912 is a wasteful number, since it uses less digits than its factorization.

129504912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400 (or 8394 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 129504912 is about 11380.0224955841. The cubic root of 129504912 is about 505.9358029655.

The spelling of 129504912 in words is "one hundred twenty-nine million, five hundred four thousand, nine hundred twelve".