285203 has 4 divisors (see below), whose sum is σ = 286440. Its totient is φ = 283968.

The previous prime is 285199. The next prime is 285221. The reversal of 285203 is 302582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 285203 - 2² = 285199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (71610).

2²⁸⁵²⁰³ is an apocalyptic number.

285203 is a deficient number, since it is larger than the sum of its proper divisors (1237).

285203 is an equidigital number, since it uses as much as digits as its factorization.

285203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 285203 is about 534.0440056774. The cubic root of 285203 is about 65.8240646390.

Adding to 285203 its reverse (302582), we get a palindrome (587785).

The spelling of 285203 in words is "two hundred eighty-five thousand, two hundred three".