129534252 has 48 divisors (see below), whose sum is σ = 323108352. Its totient is φ = 40289920.

The previous prime is 129534247. The next prime is 129534257. The reversal of 129534252 is 252435921.

It is an interprime number because it is at equal distance from previous prime (129534247) and next prime (129534257).

It is not an unprimeable number, because it can be changed into a prime (129534257) by changing a digit.

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, 5593 + ... + 17039.

It is an arithmetic number, because the mean of its divisors is an integer number (6731424).

Almost surely, 2^129534252 is an apocalyptic number.

129534252 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 129534252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161554176).

129534252 is an abundant number, since it is smaller than the sum of its proper divisors (193574100).

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

129534252 is a wasteful number, since it uses less digits than its factorization.

129534252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11518 (or 11516 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 129534252 is about 11381.3115237217. The cubic root of 129534252 is about 505.9740075282.

It can be divided in two parts, 12953 and 4252, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 129534252 in words is "one hundred twenty-nine million, five hundred thirty-four thousand, two hundred fifty-two".