129552 has 20 divisors (see below), whose sum is σ = 334800. Its totient is φ = 43168.

The previous prime is 129539. The next prime is 129553. The reversal of 129552 is 255921.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (129553) by changing a digit.

129552 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2¹²⁹⁵⁵² is an apocalyptic number.

129552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129552 is an abundant number, since it is smaller than the sum of its proper divisors (205248).

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

129552 is a wasteful number, since it uses less digits than its factorization.

129552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710 (or 2704 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 129552 is about 359.9333271594. The cubic root of 129552 is about 50.5997114973.

The spelling of 129552 in words is "one hundred twenty-nine thousand, five hundred fifty-two".