284842 has 4 divisors (see below), whose sum is σ = 427266. Its totient is φ = 142420.

The previous prime is 284839. The next prime is 284857. The reversal of 284842 is 248482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 63001 = 471^2 + 251^2 .

It is a super-2 number, since 2×284842² = 162269929928, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 284842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71209 + ... + 71212.

2²⁸⁴⁸⁴² is an apocalyptic number.

284842 is a deficient number, since it is larger than the sum of its proper divisors (142424).

284842 is a wasteful number, since it uses less digits than its factorization.

284842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142423.

The product of its digits is 4096, while the sum is 28.

The square root of 284842 is about 533.7059115281. The cubic root of 284842 is about 65.7962803119.

The spelling of 284842 in words is "two hundred eighty-four thousand, eight hundred forty-two".