285039 has 28 divisors (see below), whose sum is σ = 472176. Its totient is φ = 171072.

The previous prime is 285031. The next prime is 285049. The reversal of 285039 is 930582.

It is not a de Polignac number, because 285039 - 2³ = 285031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285031) 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 27 ways as a sum of consecutive naturals, for example, 12382 + ... + 12404.

2²⁸⁵⁰³⁹ is an apocalyptic number.

285039 is a deficient number, since it is larger than the sum of its proper divisors (187137).

285039 is an equidigital number, since it uses as much as digits as its factorization.

285039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 285039 is about 533.8904381987. The cubic root of 285039 is about 65.8114453042.

The spelling of 285039 in words is "two hundred eighty-five thousand, thirty-nine".