285943 has 4 divisors (see below), whose sum is σ = 326800. Its totient is φ = 245088.

The previous prime is 285937. The next prime is 285949. The reversal of 285943 is 349582.

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

It is an interprime number because it is at equal distance from previous prime (285937) and next prime (285949).

It is a cyclic number.

It is not a de Polignac number, because 285943 - 2¹³ = 277751 is a prime.

It is an Ulam number.

It is a Duffinian number.

285943 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285949) 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, 20418 + ... + 20431.

It is an arithmetic number, because the mean of its divisors is an integer number (81700).

2²⁸⁵⁹⁴³ is an apocalyptic number.

285943 is a deficient number, since it is larger than the sum of its proper divisors (40857).

285943 is an equidigital number, since it uses as much as digits as its factorization.

285943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40856.

The product of its digits is 8640, while the sum is 31.

The square root of 285943 is about 534.7363836509. The cubic root of 285943 is about 65.8809454575.

The spelling of 285943 in words is "two hundred eighty-five thousand, nine hundred forty-three".