129241800 has 144 divisors (see below), whose sum is σ = 457002000. Its totient is φ = 32641920.

The previous prime is 129241787. The next prime is 129241813. The reversal of 129241800 is 8142921.

It is an interprime number because it is at equal distance from previous prime (129241787) and next prime (129241813).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32311 + ... + 36089.

It is an arithmetic number, because the mean of its divisors is an integer number (3173625).

Almost surely, 2^129241800 is an apocalyptic number.

129241800 is a gapful number since it is divisible by the number (10) 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 129241800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228501000).

129241800 is an abundant number, since it is smaller than the sum of its proper divisors (327760200).

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

129241800 is a wasteful number, since it uses less digits than its factorization.

129241800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820 (or 3808 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 129241800 is about 11368.4563595943. The cubic root of 129241800 is about 505.5929381491.

The spelling of 129241800 in words is "one hundred twenty-nine million, two hundred forty-one thousand, eight hundred".