129240852 has 48 divisors (see below), whose sum is σ = 333551232. Its totient is φ = 38689920.

The previous prime is 129240833. The next prime is 129240863. The reversal of 129240852 is 258042921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5424 + ... + 16967.

It is an arithmetic number, because the mean of its divisors is an integer number (6948984).

Almost surely, 2^129240852 is an apocalyptic number.

129240852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129240852 is an abundant number, since it is smaller than the sum of its proper divisors (204310380).

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

129240852 is a wasteful number, since it uses less digits than its factorization.

129240852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22448 (or 22446 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 129240852 is about 11368.4146652029. The cubic root of 129240852 is about 505.5917019565.

The spelling of 129240852 in words is "one hundred twenty-nine million, two hundred forty thousand, eight hundred fifty-two".