128931075 has 96 divisors (see below), whose sum is σ = 291648000. Its totient is φ = 54380160.

The previous prime is 128931059. The next prime is 128931119. The reversal of 128931075 is 570139821.

It is not a de Polignac number, because 128931075 - 2⁴ = 128931059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 60376 + ... + 62474.

It is an arithmetic number, because the mean of its divisors is an integer number (3038000).

Almost surely, 2^128931075 is an apocalyptic number.

128931075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128931075 is an abundant number, since it is smaller than the sum of its proper divisors (162716925).

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

128931075 is a wasteful number, since it uses less digits than its factorization.

128931075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 128931075 is about 11354.7820322541. The cubic root of 128931075 is about 505.1874283859.

The spelling of 128931075 in words is "one hundred twenty-eight million, nine hundred thirty-one thousand, seventy-five".