285842 has 8 divisors (see below), whose sum is σ = 432432. Its totient is φ = 141700.

The previous prime is 285841. The next prime is 285871. The reversal of 285842 is 248582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×285842³ = 70064718333503064, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285842.

It is not an unprimeable number, because it can be changed into a prime (285841) 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, 284 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (54054).

2²⁸⁵⁸⁴² is an apocalyptic number.

285842 is a deficient number, since it is larger than the sum of its proper divisors (146590).

285842 is a wasteful number, since it uses less digits than its factorization.

285842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its digits is 5120, while the sum is 29.

The square root of 285842 is about 534.6419362527. The cubic root of 285842 is about 65.8731877819.

The spelling of 285842 in words is "two hundred eighty-five thousand, eight hundred forty-two".