129043250 has 64 divisors (see below), whose sum is σ = 290684160. Its totient is φ = 41904000.

The previous prime is 129043237. The next prime is 129043259. The reversal of 129043250 is 52340921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129043259) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 31310 + ... + 35190.

It is an arithmetic number, because the mean of its divisors is an integer number (4541940).

Almost surely, 2^129043250 is an apocalyptic number.

129043250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129043250 is an abundant number, since it is smaller than the sum of its proper divisors (161640910).

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

129043250 is a wasteful number, since it uses less digits than its factorization.

129043250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 129043250 is about 11359.7205071252. The cubic root of 129043250 is about 505.3338967551. Note that the first 3 decimals are identical.

The spelling of 129043250 in words is "one hundred twenty-nine million, forty-three thousand, two hundred fifty".