285303 has 4 divisors (see below), whose sum is σ = 380408. Its totient is φ = 190200.

The previous prime is 285301. The next prime is 285317. The reversal of 285303 is 303582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 285303 - 2¹ = 285301 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285301) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 47548 + ... + 47553.

It is an arithmetic number, because the mean of its divisors is an integer number (95102).

2²⁸⁵³⁰³ is an apocalyptic number.

285303 is a deficient number, since it is larger than the sum of its proper divisors (95105).

285303 is an equidigital number, since it uses as much as digits as its factorization.

285303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95104.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 285303 is about 534.1376227153. The cubic root of 285303 is about 65.8317569813.

Adding to 285303 its reverse (303582), we get a palindrome (588885).

The spelling of 285303 in words is "two hundred eighty-five thousand, three hundred three".