128485 has 8 divisors (see below), whose sum is σ = 176256. Its totient is φ = 88080.

The previous prime is 128483. The next prime is 128489. The reversal of 128485 is 584821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128485 - 2¹ = 128483 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1801 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (22032).

128485 is a Friedman number, since it can be written as 5^8+4-2^18, using all its digits and the basic arithmetic operations.

2¹²⁸⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

128485 is a deficient number, since it is larger than the sum of its proper divisors (47771).

128485 is an equidigital number, since it uses as much as digits as its factorization.

128485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683.

The product of its digits is 2560, while the sum is 28.

The square root of 128485 is about 358.4480436549. The cubic root of 128485 is about 50.4604140318.

It can be divided in two parts, 1284 and 85, that added together give a square (1369 = 37²).

The spelling of 128485 in words is "one hundred twenty-eight thousand, four hundred eighty-five".