204825 has 12 divisors (see below), whose sum is σ = 338768. Its totient is φ = 109200.

The previous prime is 204821. The next prime is 204857. The reversal of 204825 is 528402.

It is not a de Polignac number, because 204825 - 2² = 204821 is a prime.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2¹⁶ + 0 + 8⁴ + 4⁶ + 2¹⁷ + 5² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1291 + ... + 1440.

2²⁰⁴⁸²⁵ is an apocalyptic number.

204825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204825 is a deficient number, since it is larger than the sum of its proper divisors (133943).

204825 is a wasteful number, since it uses less digits than its factorization.

204825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2739 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 204825 is about 452.5759604751. The cubic root of 204825 is about 58.9469023387.

The spelling of 204825 in words is "two hundred four thousand, eight hundred twenty-five".