204291 has 6 divisors (see below), whose sum is σ = 295100. Its totient is φ = 136188.

The previous prime is 204251. The next prime is 204299. The reversal of 204291 is 192402.

204291 = 33² + 34² + ... + 86².

It is not a de Polignac number, because 204291 - 2⁷ = 204163 is a prime.

It is a Duffinian number.

204291 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (204299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11341 + ... + 11358.

2²⁰⁴²⁹¹ is an apocalyptic number.

204291 is a deficient number, since it is larger than the sum of its proper divisors (90809).

204291 is a wasteful number, since it uses less digits than its factorization.

204291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22705 (or 22702 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 204291 is about 451.9856192403. The cubic root of 204291 is about 58.8956308619.

Adding to 204291 its reverse (192402), we get a palindrome (396693).

The spelling of 204291 in words is "two hundred four thousand, two hundred ninety-one".