129338250 has 64 divisors (see below), whose sum is σ = 324425088. Its totient is φ = 34320000.

The previous prime is 129338243. The next prime is 129338257. The reversal of 129338250 is 52833921.

It is an interprime number because it is at equal distance from previous prime (129338243) and next prime (129338257).

It is not an unprimeable number, because it can be changed into a prime (129338257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247990 + ... + 248510.

It is an arithmetic number, because the mean of its divisors is an integer number (5069142).

Almost surely, 2^129338250 is an apocalyptic number.

129338250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129338250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162212544).

129338250 is an abundant number, since it is smaller than the sum of its proper divisors (195086838).

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

129338250 is a wasteful number, since it uses less digits than its factorization.

129338250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 129338250 is about 11372.6975691786. The cubic root of 129338250 is about 505.7186774309.

The spelling of 129338250 in words is "one hundred twenty-nine million, three hundred thirty-eight thousand, two hundred fifty".