204867 has 24 divisors (see below), whose sum is σ = 340704. Its totient is φ = 117504.

The previous prime is 204859. The next prime is 204871. The reversal of 204867 is 768402.

It is not a de Polignac number, because 204867 - 2³ = 204859 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 204867.

It is not an unprimeable number, because it can be changed into a prime (204857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1938 + ... + 2040.

It is an arithmetic number, because the mean of its divisors is an integer number (14196).

2²⁰⁴⁸⁶⁷ is an apocalyptic number.

204867 is a deficient number, since it is larger than the sum of its proper divisors (135837).

204867 is a wasteful number, since it uses less digits than its factorization.

204867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 204867 is about 452.6223591472. The cubic root of 204867 is about 58.9509311449.

The spelling of 204867 in words is "two hundred four thousand, eight hundred sixty-seven".