129201250 has 40 divisors (see below), whose sum is σ = 248179932. Its totient is φ = 50400000.

The previous prime is 129201217. The next prime is 129201251. The reversal of 129201250 is 52102921.

It can be written as a sum of positive squares in 10 ways, for example, as 84805681 + 44395569 = 9209^2 + 6663^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (129201251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49990 + ... + 52510.

Almost surely, 2^129201250 is an apocalyptic number.

129201250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129201250 is a deficient number, since it is larger than the sum of its proper divisors (118978682).

129201250 is an equidigital number, since it uses as much as digits as its factorization.

129201250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2569 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 129201250 is about 11366.6727761469. The cubic root of 129201250 is about 505.5400555209.

The spelling of 129201250 in words is "one hundred twenty-nine million, two hundred one thousand, two hundred fifty".