129725600 has 72 divisors (see below), whose sum is σ = 318917088. Its totient is φ = 51526400.

The previous prime is 129725579. The next prime is 129725611. The reversal of 129725600 is 6527921.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133115 + ... + 134085.

It is an arithmetic number, because the mean of its divisors is an integer number (4429404).

Almost surely, 2^129725600 is an apocalyptic number.

129725600 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 129725600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159458544).

129725600 is an abundant number, since it is smaller than the sum of its proper divisors (189191488).

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

129725600 is a wasteful number, since it uses less digits than its factorization.

129725600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 129725600 is about 11389.7146584100. The cubic root of 129725600 is about 506.2230265566.

The spelling of 129725600 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, six hundred".