204573 has 16 divisors (see below), whose sum is σ = 297920. Its totient is φ = 124416.

The previous prime is 204563. The next prime is 204583. The reversal of 204573 is 375402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204563) and next prime (204583).

It is not a de Polignac number, because 204573 - 2⁴ = 204557 is a prime.

It is a super-2 number, since 2×204573² = 83700224658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204563) 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 15 ways as a sum of consecutive naturals, for example, 2061 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (18620).

2²⁰⁴⁵⁷³ is an apocalyptic number.

It is an amenable number.

204573 is a deficient number, since it is larger than the sum of its proper divisors (93347).

204573 is a wasteful number, since it uses less digits than its factorization.

204573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

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

The square root of 204573 is about 452.2974684873. The cubic root of 204573 is about 58.9227179284.

Adding to 204573 its reverse (375402), we get a palindrome (579975).

It can be divided in two parts, 204 and 573, that added together give a palindrome (777).

The spelling of 204573 in words is "two hundred four thousand, five hundred seventy-three".