204425 has 24 divisors (see below), whose sum is σ = 296856. Its totient is φ = 138240.

The previous prime is 204397. The next prime is 204427. The reversal of 204425 is 524402.

204425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 24649 + 179776 = 157^2 + 424^2 .

It is not a de Polignac number, because 204425 - 2⁶ = 204361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204425.

It is not an unprimeable number, because it can be changed into a prime (204427) 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, 5507 + ... + 5543.

It is an arithmetic number, because the mean of its divisors is an integer number (12369).

2²⁰⁴⁴²⁵ is an apocalyptic number.

204425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204425 is a deficient number, since it is larger than the sum of its proper divisors (92431).

204425 is a wasteful number, since it uses less digits than its factorization.

204425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 72 counting only the distinct ones).

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

The square root of 204425 is about 452.1338297451. The cubic root of 204425 is about 58.9085051272.

Adding to 204425 its reverse (524402), we get a palindrome (728827).

The spelling of 204425 in words is "two hundred four thousand, four hundred twenty-five".