129457900 has 108 divisors (see below), whose sum is σ = 332940496. Its totient is φ = 43401600.

The previous prime is 129457879. The next prime is 129457949. The reversal of 129457900 is 9754921.

It is a self number, because there is not a number n which added to its sum of digits gives 129457900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 156889 + ... + 157711.

Almost surely, 2^129457900 is an apocalyptic number.

129457900 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 129457900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166470248).

129457900 is an abundant number, since it is smaller than the sum of its proper divisors (203482596).

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

129457900 is a wasteful number, since it uses less digits than its factorization.

129457900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 129457900 is about 11377.9567585749. The cubic root of 129457900 is about 505.8745750880.

The spelling of 129457900 in words is "one hundred twenty-nine million, four hundred fifty-seven thousand, nine hundred".