284551 has 2 divisors, whose sum is σ = 284552. Its totient is φ = 284550.

The previous prime is 284539. The next prime is 284561. The reversal of 284551 is 155482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 284551 - 2⁷ = 284423 is a prime.

284551 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142275 + 142276.

It is an arithmetic number, because the mean of its divisors is an integer number (142276).

2²⁸⁴⁵⁵¹ is an apocalyptic number.

284551 is a deficient number, since it is larger than the sum of its proper divisors (1).

284551 is an equidigital number, since it uses as much as digits as its factorization.

284551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 284551 is about 533.4332198129. The cubic root of 284551 is about 65.7738664339.

The spelling of 284551 in words is "two hundred eighty-four thousand, five hundred fifty-one".