204874 has 4 divisors (see below), whose sum is σ = 307314. Its totient is φ = 102436.

The previous prime is 204871. The next prime is 204887. The reversal of 204874 is 478402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478402 = 2 ⋅239201.

It can be written as a sum of positive squares in only one way, i.e., 119025 + 85849 = 345^2 + 293^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (204871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51217 + ... + 51220.

2²⁰⁴⁸⁷⁴ is an apocalyptic number.

204874 is a deficient number, since it is larger than the sum of its proper divisors (102440).

204874 is a wasteful number, since it uses less digits than its factorization.

204874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102439.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 204874 is about 452.6300917968. The cubic root of 204874 is about 58.9516025590.

The spelling of 204874 in words is "two hundred four thousand, eight hundred seventy-four".