128475 has 18 divisors (see below), whose sum is σ = 230516. Its totient is φ = 68400.

The previous prime is 128473. The next prime is 128477. The reversal of 128475 is 574821.

It is an interprime number because it is at equal distance from previous prime (128473) and next prime (128477).

It is not a de Polignac number, because 128475 - 2¹ = 128473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128473) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 61 + ... + 510.

2¹²⁸⁴⁷⁵ is an apocalyptic number.

128475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128475 is a deficient number, since it is larger than the sum of its proper divisors (102041).

128475 is a wasteful number, since it uses less digits than its factorization.

128475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 579 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 128475 is about 358.4340943605. The cubic root of 128475 is about 50.4591048849.

The spelling of 128475 in words is "one hundred twenty-eight thousand, four hundred seventy-five".