129855552 has 56 divisors (see below), whose sum is σ = 345472512. Its totient is φ = 43046400.

The previous prime is 129855541. The next prime is 129855589. The reversal of 129855552 is 255558921.

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 7 ways as a sum of consecutive naturals, for example, 34902 + ... + 38442.

It is an arithmetic number, because the mean of its divisors is an integer number (6169152).

Almost surely, 2^129855552 is an apocalyptic number.

129855552 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 129855552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172736256).

129855552 is an abundant number, since it is smaller than the sum of its proper divisors (215616960).

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

129855552 is a wasteful number, since it uses less digits than its factorization.

129855552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747 (or 3737 counting only the distinct ones).

The product of its digits is 180000, while the sum is 42.

The square root of 129855552 is about 11395.4180265579. The cubic root of 129855552 is about 506.3920056439.

The spelling of 129855552 in words is "one hundred twenty-nine million, eight hundred fifty-five thousand, five hundred fifty-two".