285087 has 16 divisors (see below), whose sum is σ = 425088. Its totient is φ = 168480.

The previous prime is 285079. The next prime is 285091. The reversal of 285087 is 780582.

It is not a de Polignac number, because 285087 - 2³ = 285079 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285087.

It is not an unprimeable number, because it can be changed into a prime (285007) 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 15 ways as a sum of consecutive naturals, for example, 1668 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (26568).

2²⁸⁵⁰⁸⁷ is an apocalyptic number.

285087 is a deficient number, since it is larger than the sum of its proper divisors (140001).

285087 is a wasteful number, since it uses less digits than its factorization.

285087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 285087 is about 533.9353893497. The cubic root of 285087 is about 65.8151392689.

It can be divided in two parts, 28 and 5087, that added together give a palindrome (5115).

The spelling of 285087 in words is "two hundred eighty-five thousand, eighty-seven".