129002500 has 60 divisors (see below), whose sum is σ = 307813968. Its totient is φ = 46900000.

The previous prime is 129002479. The next prime is 129002507. The reversal of 129002500 is 5200921.

It is not an unprimeable number, because it can be changed into a prime (129002507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25155 + ... + 29845.

Almost surely, 2^129002500 is an apocalyptic number.

129002500 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 129002500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153906984).

129002500 is an abundant number, since it is smaller than the sum of its proper divisors (178811468).

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

129002500 is a wasteful number, since it uses less digits than its factorization.

129002500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726 (or 4709 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 129002500 is about 11357.9267474306. The cubic root of 129002500 is about 505.2806987659.

It can be divided in two parts, 12900 and 2500, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 129002500 in words is "one hundred twenty-nine million, two thousand, five hundred".