204375 has 20 divisors (see below), whose sum is σ = 343640. Its totient is φ = 108000.

The previous prime is 204371. The next prime is 204377. The reversal of 204375 is 573402.

It is a happy number.

It is not a de Polignac number, because 204375 - 2² = 204371 is a prime.

204375 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1821 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (17182).

204375 is a Friedman number, since it can be written as (320+7)*5^4, using all its digits and the basic arithmetic operations.

2²⁰⁴³⁷⁵ is an apocalyptic number.

204375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

204375 is a deficient number, since it is larger than the sum of its proper divisors (139265).

204375 is an equidigital number, since it uses as much as digits as its factorization.

204375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 204375 is about 452.0785330006. The cubic root of 204375 is about 58.9037019550.

Adding to 204375 its reverse (573402), we get a palindrome (777777).

The spelling of 204375 in words is "two hundred four thousand, three hundred seventy-five".