204595 has 16 divisors (see below), whose sum is σ = 272160. Its totient is φ = 146944.

The previous prime is 204587. The next prime is 204599. The reversal of 204595 is 595402.

It is a cyclic number.

It is not a de Polignac number, because 204595 - 2³ = 204587 is a prime.

It is a super-2 number, since 2×204595² = 83718228050, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (204599) 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, 2424 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (17010).

2²⁰⁴⁵⁹⁵ is an apocalyptic number.

204595 is a deficient number, since it is larger than the sum of its proper divisors (67565).

204595 is a wasteful number, since it uses less digits than its factorization.

204595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 204595 is about 452.3217881111. The cubic root of 204595 is about 58.9248300568.

Adding to 204595 its reverse (595402), we get a palindrome (799997).

The spelling of 204595 in words is "two hundred four thousand, five hundred ninety-five".