2285 has 4 divisors (see below), whose sum is σ = 2748. Its totient is φ = 1824.

The previous prime is 2281. The next prime is 2287. The reversal of 2285 is 5822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1444 + 841 = 38^2 + 29^2 .

It is a cyclic number.

It is not a de Polignac number, because 2285 - 2² = 2281 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 233.

It is an arithmetic number, because the mean of its divisors is an integer number (687).

2²²⁸⁵ is an apocalyptic number.

It is an amenable number.

2285 is a deficient number, since it is larger than the sum of its proper divisors (463).

2285 is an equidigital number, since it uses as much as digits as its factorization.

2285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462.

The product of its digits is 160, while the sum is 17.

The square root of 2285 is about 47.8016736109. The cubic root of 2285 is about 13.1713028236.

The spelling of 2285 in words is "two thousand, two hundred eighty-five".