128825187 has 16 divisors (see below), whose sum is σ = 181104000. Its totient is φ = 81229824.

The previous prime is 128825183. The next prime is 128825227. The reversal of 128825187 is 781528821.

It is not a de Polignac number, because 128825187 - 2² = 128825183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128825183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42364 + ... + 45302.

It is an arithmetic number, because the mean of its divisors is an integer number (11319000).

Almost surely, 2^128825187 is an apocalyptic number.

128825187 is a deficient number, since it is larger than the sum of its proper divisors (52278813).

128825187 is a wasteful number, since it uses less digits than its factorization.

128825187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730.

The product of its digits is 71680, while the sum is 42.

The square root of 128825187 is about 11350.1183694268. The cubic root of 128825187 is about 505.0490910680.

The spelling of 128825187 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, one hundred eighty-seven".