284681 has 2 divisors, whose sum is σ = 284682. Its totient is φ = 284680.

The previous prime is 284659. The next prime is 284689. The reversal of 284681 is 186482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259081 + 25600 = 509^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 284681 - 2¹⁴ = 268297 is a prime.

It is a super-2 number, since 2×284681² = 162086543522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 8 + 6⁷ + 4⁶ + 8³ + 1 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 284681.

It is not a weakly prime, because it can be changed into another prime (284689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142340 + 142341.

It is an arithmetic number, because the mean of its divisors is an integer number (142341).

2²⁸⁴⁶⁸¹ is an apocalyptic number.

It is an amenable number.

284681 is a deficient number, since it is larger than the sum of its proper divisors (1).

284681 is an equidigital number, since it uses as much as digits as its factorization.

284681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 284681 is about 533.5550580774. Note that the first 3 decimals coincide. The cubic root of 284681 is about 65.7838813941.

The spelling of 284681 in words is "two hundred eighty-four thousand, six hundred eighty-one".