284257 has 8 divisors (see below), whose sum is σ = 314496. Its totient is φ = 255552.

The previous prime is 284243. The next prime is 284261. The reversal of 284257 is 752482.

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 284257 - 2⁷ = 284129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284227) 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, 28 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2²⁸⁴²⁵⁷ is an apocalyptic number.

It is an amenable number.

284257 is a deficient number, since it is larger than the sum of its proper divisors (30239).

284257 is a wasteful number, since it uses less digits than its factorization.

284257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 4480, while the sum is 28.

The square root of 284257 is about 533.1575752064. The cubic root of 284257 is about 65.7512059613.

The spelling of 284257 in words is "two hundred eighty-four thousand, two hundred fifty-seven".