285422 has 4 divisors (see below), whose sum is σ = 428136. Its totient is φ = 142710.

The previous prime is 285421. The next prime is 285433. The reversal of 285422 is 224582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224582 = 2 ⋅112291.

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 285422.

It is not an unprimeable number, because it can be changed into a prime (285421) 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 as a sum of consecutive naturals, namely, 71354 + ... + 71357.

It is an arithmetic number, because the mean of its divisors is an integer number (107034).

2²⁸⁵⁴²² is an apocalyptic number.

285422 is a deficient number, since it is larger than the sum of its proper divisors (142714).

285422 is a wasteful number, since it uses less digits than its factorization.

285422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142713.

The product of its digits is 1280, while the sum is 23.

The square root of 285422 is about 534.2490056144. The cubic root of 285422 is about 65.8409085267.

It can be divided in two parts, 285 and 422, that added together give a palindrome (707).

The spelling of 285422 in words is "two hundred eighty-five thousand, four hundred twenty-two".