285287 has 2 divisors, whose sum is σ = 285288. Its totient is φ = 285286.

The previous prime is 285283. The next prime is 285289. The reversal of 285287 is 782582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285287 - 2² = 285283 is a prime.

Together with 285289, it forms a pair of twin primes.

It is a Chen prime.

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 285287.

It is not a weakly prime, because it can be changed into another prime (285281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142643 + 142644.

It is an arithmetic number, because the mean of its divisors is an integer number (142644).

2²⁸⁵²⁸⁷ is an apocalyptic number.

285287 is a deficient number, since it is larger than the sum of its proper divisors (1).

285287 is an equidigital number, since it uses as much as digits as its factorization.

285287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 285287 is about 534.1226450919. The cubic root of 285287 is about 65.8305263273.

The spelling of 285287 in words is "two hundred eighty-five thousand, two hundred eighty-seven".