129243800 has 48 divisors (see below), whose sum is σ = 343422960. Its totient is φ = 44311680.

The previous prime is 129243797. The next prime is 129243823. The reversal of 129243800 is 8342921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44759 + ... + 47558.

It is an arithmetic number, because the mean of its divisors is an integer number (7154645).

Almost surely, 2^129243800 is an apocalyptic number.

129243800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129243800 is an abundant number, since it is smaller than the sum of its proper divisors (214179160).

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

129243800 is a wasteful number, since it uses less digits than its factorization.

129243800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92340 (or 92331 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 129243800 is about 11368.5443219438. The cubic root of 129243800 is about 505.5955461306.

The spelling of 129243800 in words is "one hundred twenty-nine million, two hundred forty-three thousand, eight hundred".