129225250 has 128 divisors (see below), whose sum is σ = 310003200. Its totient is φ = 39984000.

The previous prime is 129225233. The next prime is 129225263. The reversal of 129225250 is 52522921.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 943182 + ... + 943318.

It is an arithmetic number, because the mean of its divisors is an integer number (2421900).

Almost surely, 2^129225250 is an apocalyptic number.

129225250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129225250 is an abundant number, since it is smaller than the sum of its proper divisors (180777950).

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

129225250 is a wasteful number, since it uses less digits than its factorization.

129225250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 129225250 is about 11367.7284450325. The cubic root of 129225250 is about 505.5713560698.

The spelling of 129225250 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred fifty".