284851 has 4 divisors (see below), whose sum is σ = 325552. Its totient is φ = 244152.

The previous prime is 284839. The next prime is 284857. The reversal of 284851 is 158482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158482 = 2 ⋅79241.

It is a cyclic number.

It is not a de Polignac number, because 284851 - 2⁵ = 284819 is a prime.

It is a super-2 number, since 2×284851² = 162280184402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284857) 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, 20340 + ... + 20353.

It is an arithmetic number, because the mean of its divisors is an integer number (81388).

2²⁸⁴⁸⁵¹ is an apocalyptic number.

284851 is a deficient number, since it is larger than the sum of its proper divisors (40701).

284851 is an equidigital number, since it uses as much as digits as its factorization.

284851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40700.

The product of its digits is 2560, while the sum is 28.

The square root of 284851 is about 533.7143430713. The cubic root of 284851 is about 65.7969732812.

The spelling of 284851 in words is "two hundred eighty-four thousand, eight hundred fifty-one".