285342 has 16 divisors (see below), whose sum is σ = 600960. Its totient is φ = 90072.

The previous prime is 285317. The next prime is 285343. The reversal of 285342 is 243582.

It is a d-powerful number, because it can be written as 2¹⁴ + 8² + 3⁸ + 5³ + 4³ + 2¹⁸ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285343) by changing a digit.

285342 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138 + ... + 1365.

It is an arithmetic number, because the mean of its divisors is an integer number (37560).

2²⁸⁵³⁴² is an apocalyptic number.

285342 is an abundant number, since it is smaller than the sum of its proper divisors (315618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285342 is a wasteful number, since it uses less digits than its factorization.

285342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527.

The product of its digits is 1920, while the sum is 24.

The square root of 285342 is about 534.1741289130. The cubic root of 285342 is about 65.8347565075.

The spelling of 285342 in words is "two hundred eighty-five thousand, three hundred forty-two".