204485 has 4 divisors (see below), whose sum is σ = 245388. Its totient is φ = 163584.

The previous prime is 204481. The next prime is 204487. The reversal of 204485 is 584402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131044 + 73441 = 362^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 204485 - 2² = 204481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20444 + ... + 20453.

It is an arithmetic number, because the mean of its divisors is an integer number (61347).

2²⁰⁴⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

204485 is a deficient number, since it is larger than the sum of its proper divisors (40903).

204485 is an equidigital number, since it uses as much as digits as its factorization.

204485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40902.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 204485 is about 452.2001769128. The cubic root of 204485 is about 58.9142679002.

Adding to 204485 its reverse (584402), we get a palindrome (788887).

The spelling of 204485 in words is "two hundred four thousand, four hundred eighty-five".