204245 has 4 divisors (see below), whose sum is σ = 245100. Its totient is φ = 163392.

The previous prime is 204233. The next prime is 204251. The reversal of 204245 is 542402.

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 106276 + 97969 = 326^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 204245 - 2⁸ = 203989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20420 + ... + 20429.

It is an arithmetic number, because the mean of its divisors is an integer number (61275).

2²⁰⁴²⁴⁵ is an apocalyptic number.

It is an amenable number.

204245 is a deficient number, since it is larger than the sum of its proper divisors (40855).

204245 is an equidigital number, since it uses as much as digits as its factorization.

204245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40854.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 204245 is about 451.9347298007. The cubic root of 204245 is about 58.8912100400.

Adding to 204245 its reverse (542402), we get a palindrome (746647).

The spelling of 204245 in words is "two hundred four thousand, two hundred forty-five".