128961075 has 24 divisors (see below), whose sum is σ = 224440000. Its totient is φ = 65158560.

The previous prime is 128961067. The next prime is 128961109. The reversal of 128961075 is 570169821.

It is not a de Polignac number, because 128961075 - 2³ = 128961067 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43825 + ... + 46674.

Almost surely, 2^128961075 is an apocalyptic number.

128961075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128961075 is a deficient number, since it is larger than the sum of its proper divisors (95478925).

128961075 is a wasteful number, since it uses less digits than its factorization.

128961075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90531 (or 90526 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 128961075 is about 11356.1029847391. The cubic root of 128961075 is about 505.2266080989.

The spelling of 128961075 in words is "one hundred twenty-eight million, nine hundred sixty-one thousand, seventy-five".