129740100 has 72 divisors (see below), whose sum is σ = 429014208. Its totient is φ = 29654400.

The previous prime is 129740089. The next prime is 129740123. The reversal of 129740100 is 1047921.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28791 + ... + 32990.

Almost surely, 2^129740100 is an apocalyptic number.

129740100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129740100 is an abundant number, since it is smaller than the sum of its proper divisors (299274108).

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

129740100 is a wasteful number, since it uses less digits than its factorization.

129740100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61805 (or 61798 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 129740100 is about 11390.3511798364. The cubic root of 129740100 is about 506.2418867775.

The spelling of 129740100 in words is "one hundred twenty-nine million, seven hundred forty thousand, one hundred".