204812 has 6 divisors (see below), whose sum is σ = 358428. Its totient is φ = 102404.

The previous prime is 204803. The next prime is 204821. The reversal of 204812 is 218402.

It is an interprime number because it is at equal distance from previous prime (204803) and next prime (204821).

It is a super-3 number, since 3×204812³ = 25774333889745984, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25598 + ... + 25605.

It is an arithmetic number, because the mean of its divisors is an integer number (59738).

2²⁰⁴⁸¹² is an apocalyptic number.

It is an amenable number.

204812 is a deficient number, since it is larger than the sum of its proper divisors (153616).

204812 is a wasteful number, since it uses less digits than its factorization.

204812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51207 (or 51205 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 204812 is about 452.5615980173. The cubic root of 204812 is about 58.9456552156.

The spelling of 204812 in words is "two hundred four thousand, eight hundred twelve".