204995 has 8 divisors (see below), whose sum is σ = 281184. Its totient is φ = 140544.

The previous prime is 204983. The next prime is 205019. The reversal of 204995 is 599402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204995 - 2⁴ = 204979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2894 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (35148).

2²⁰⁴⁹⁹⁵ is an apocalyptic number.

204995 is a deficient number, since it is larger than the sum of its proper divisors (76189).

204995 is an equidigital number, since it uses as much as digits as its factorization.

204995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 204995 is about 452.7637352969. The cubic root of 204995 is about 58.9632060163.

The spelling of 204995 in words is "two hundred four thousand, nine hundred ninety-five".