128575 has 12 divisors (see below), whose sum is σ = 164920. Its totient is φ = 99360.

The previous prime is 128563. The next prime is 128591. The reversal of 128575 is 575821.

It is not a de Polignac number, because 128575 - 2¹³ = 120383 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856 + ... + 994.

2¹²⁸⁵⁷⁵ is an apocalyptic number.

128575 is a deficient number, since it is larger than the sum of its proper divisors (36345).

128575 is a wasteful number, since it uses less digits than its factorization.

128575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 181 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 128575 is about 358.5735628849. The cubic root of 128575 is about 50.4721932987.

It can be divided in two parts, 128 and 575, that added together give a triangular number (703 = T₃₇).

The spelling of 128575 in words is "one hundred twenty-eight thousand, five hundred seventy-five".