282985 has 4 divisors (see below), whose sum is σ = 339588. Its totient is φ = 226384.

The previous prime is 282977. The next prime is 282991. The reversal of 282985 is 589282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589282 = 2 ⋅294641.

It can be written as a sum of positive squares in 2 ways, for example, as 85849 + 197136 = 293^2 + 444^2 .

It is a cyclic number.

It is not a de Polignac number, because 282985 - 2³ = 282977 is a prime.

It is a Duffinian number.

282985 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 282985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28294 + ... + 28303.

It is an arithmetic number, because the mean of its divisors is an integer number (84897).

2²⁸²⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

282985 is a deficient number, since it is larger than the sum of its proper divisors (56603).

282985 is an equidigital number, since it uses as much as digits as its factorization.

282985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56602.

The product of its digits is 11520, while the sum is 34.

The square root of 282985 is about 531.9633446019. The cubic root of 282985 is about 65.6529842858.

The spelling of 282985 in words is "two hundred eighty-two thousand, nine hundred eighty-five".