2005843 has 16 divisors (see below), whose sum is σ = 2439360. Its totient is φ = 1612800.

The previous prime is 2005841. The next prime is 2005859. The reversal of 2005843 is 3485002.

It is not a de Polignac number, because 2005843 - 2¹ = 2005841 is a prime.

It is a super-2 number, since 2×2005843² = 8046812281298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2005841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8203 + ... + 8443.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2^2005843 is an apocalyptic number.

2005843 is a deficient number, since it is larger than the sum of its proper divisors (433517).

2005843 is a wasteful number, since it uses less digits than its factorization.

2005843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2005843 is about 1416.2778682165. The cubic root of 2005843 is about 126.1146810098.

The spelling of 2005843 in words is "two million, five thousand, eight hundred forty-three".