128551875 has 80 divisors (see below), whose sum is σ = 235049760. Its totient is φ = 62208000.

The previous prime is 128551859. The next prime is 128551877. The reversal of 128551875 is 578155821.

128551875 = T₁₄₈₁ + T₁₄₈₂ + ... + T₁₅₈₉.

It is not a de Polignac number, because 128551875 - 2⁴ = 128551859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128551877) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1179321 + ... + 1179429.

It is an arithmetic number, because the mean of its divisors is an integer number (2938122).

Almost surely, 2^128551875 is an apocalyptic number.

128551875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128551875 is a deficient number, since it is larger than the sum of its proper divisors (106497885).

128551875 is a wasteful number, since it uses less digits than its factorization.

128551875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 171 counting only the distinct ones).

The product of its digits is 112000, while the sum is 42.

The square root of 128551875 is about 11338.0719260375. The cubic root of 128551875 is about 504.6916720637.

The spelling of 128551875 in words is "one hundred twenty-eight million, five hundred fifty-one thousand, eight hundred seventy-five".