284021 has 4 divisors (see below), whose sum is σ = 290112. Its totient is φ = 277932.

The previous prime is 284003. The next prime is 284023. The reversal of 284021 is 120482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 284021 - 2⁶ = 283957 is a prime.

It is a Duffinian number.

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 284021.

It is not an unprimeable number, because it can be changed into a prime (284023) 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, 2975 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (72528).

2²⁸⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

284021 is a deficient number, since it is larger than the sum of its proper divisors (6091).

284021 is an equidigital number, since it uses as much as digits as its factorization.

284021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 284021 is about 532.9362063137. The cubic root of 284021 is about 65.7330046143.

The spelling of 284021 in words is "two hundred eighty-four thousand, twenty-one".