204502 has 4 divisors (see below), whose sum is σ = 306756. Its totient is φ = 102250.

The previous prime is 204487. The next prime is 204509. The reversal of 204502 is 205402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205402 = 2 ⋅102701.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204509) by changing a digit.

204502 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 51124 + ... + 51127.

It is an arithmetic number, because the mean of its divisors is an integer number (76689).

2²⁰⁴⁵⁰² is an apocalyptic number.

204502 is a deficient number, since it is larger than the sum of its proper divisors (102254).

204502 is a wasteful number, since it uses less digits than its factorization.

204502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102253.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 204502 is about 452.2189735073. The cubic root of 204502 is about 58.9159004809.

Adding to 204502 its reverse (205402), we get a palindrome (409904).

Subtracting 204502 from its reverse (205402), we obtain a square (900 = 30²).

The spelling of 204502 in words is "two hundred four thousand, five hundred two".