284421 has 8 divisors (see below), whose sum is σ = 383040. Its totient is φ = 187712.

The previous prime is 284413. The next prime is 284423. The reversal of 284421 is 124482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 284421 - 2³ = 284413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 758.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2²⁸⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

284421 is a deficient number, since it is larger than the sum of its proper divisors (98619).

284421 is a wasteful number, since it uses less digits than its factorization.

284421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its digits is 512, while the sum is 21.

The square root of 284421 is about 533.3113537138. The cubic root of 284421 is about 65.7638484230.

The spelling of 284421 in words is "two hundred eighty-four thousand, four hundred twenty-one".