285043 has 4 divisors (see below), whose sum is σ = 310968. Its totient is φ = 259120.

The previous prime is 285031. The next prime is 285049. The reversal of 285043 is 340582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285043 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285049) 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, 12946 + ... + 12967.

It is an arithmetic number, because the mean of its divisors is an integer number (77742).

2²⁸⁵⁰⁴³ is an apocalyptic number.

285043 is a deficient number, since it is larger than the sum of its proper divisors (25925).

285043 is a wasteful number, since it uses less digits than its factorization.

285043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25924.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 285043 is about 533.8941842725. The cubic root of 285043 is about 65.8117531504.

The spelling of 285043 in words is "two hundred eighty-five thousand, forty-three".