129391152 has 80 divisors (see below), whose sum is σ = 366405120. Its totient is φ = 39020800.

The previous prime is 129391147. The next prime is 129391211. The reversal of 129391152 is 251193921.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 141577 + ... + 142487.

It is an arithmetic number, because the mean of its divisors is an integer number (4580064).

Almost surely, 2^129391152 is an apocalyptic number.

129391152 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 129391152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183202560).

129391152 is an abundant number, since it is smaller than the sum of its proper divisors (237013968).

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

129391152 is a wasteful number, since it uses less digits than its factorization.

129391152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1196 counting only the distinct ones).

The product of its digits is 4860, while the sum is 33.

The square root of 129391152 is about 11375.0231648116. The cubic root of 129391152 is about 505.7876178068.

The spelling of 129391152 in words is "one hundred twenty-nine million, three hundred ninety-one thousand, one hundred fifty-two".