128528575 has 18 divisors (see below), whose sum is σ = 182356136. Its totient is φ = 88031040.

The previous prime is 128528539. The next prime is 128528581. The reversal of 128528575 is 575825821.

It is not a de Polignac number, because 128528575 - 2⁹ = 128528063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 149547 + ... + 150403.

Almost surely, 2^128528575 is an apocalyptic number.

128528575 is a deficient number, since it is larger than the sum of its proper divisors (53827561).

128528575 is an frugal number, since it uses more digits than its factorization.

128528575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 869 counting only the distinct ones).

The product of its digits is 224000, while the sum is 43.

The square root of 128528575 is about 11337.0443679118. The cubic root of 128528575 is about 504.6611784686.

The spelling of 128528575 in words is "one hundred twenty-eight million, five hundred twenty-eight thousand, five hundred seventy-five".