286281 has 16 divisors (see below), whose sum is σ = 443520. Its totient is φ = 182160.

The previous prime is 286249. The next prime is 286289. The reversal of 286281 is 182682.

It is not a de Polignac number, because 286281 - 2⁵ = 286249 is a prime.

It is a super-3 number, since 3×286281³ = 70388033396178123, which contains 333 as substring. Note that it is a super-d number also for d = 2.

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

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 286281.

It is not an unprimeable number, because it can be changed into a prime (286289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2²⁸⁶²⁸¹ is an apocalyptic number.

It is an amenable number.

286281 is a deficient number, since it is larger than the sum of its proper divisors (157239).

286281 is a wasteful number, since it uses less digits than its factorization.

286281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 487 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 286281 is about 535.0523338889. The cubic root of 286281 is about 65.9068935094.

The spelling of 286281 in words is "two hundred eighty-six thousand, two hundred eighty-one".