129252 has 12 divisors (see below), whose sum is σ = 301616. Its totient is φ = 43080.

The previous prime is 129229. The next prime is 129263. The reversal of 129252 is 252921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 129252.

It is an unprimeable number.

129252 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, 5374 + ... + 5397.

2¹²⁹²⁵² is an apocalyptic number.

129252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129252 is an abundant number, since it is smaller than the sum of its proper divisors (172364).

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

129252 is a wasteful number, since it uses less digits than its factorization.

129252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10778 (or 10776 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 129252 is about 359.5163417704. The cubic root of 129252 is about 50.5606238573.

The spelling of 129252 in words is "one hundred twenty-nine thousand, two hundred fifty-two".