128901250 has 40 divisors (see below), whose sum is σ = 244243692. Its totient is φ = 51000000.

The previous prime is 128901217. The next prime is 128901257. The reversal of 128901250 is 52109821.

It can be written as a sum of positive squares in 10 ways, for example, as 328329 + 128572921 = 573^2 + 11339^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128901257) 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 19 ways as a sum of consecutive naturals, for example, 125740 + ... + 126760.

Almost surely, 2^128901250 is an apocalyptic number.

128901250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128901250 is a deficient number, since it is larger than the sum of its proper divisors (115342442).

128901250 is a wasteful number, since it uses less digits than its factorization.

128901250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 128901250 is about 11353.4686329773. The cubic root of 128901250 is about 505.1484711963.

The spelling of 128901250 in words is "one hundred twenty-eight million, nine hundred one thousand, two hundred fifty".