2005771 has 4 divisors (see below), whose sum is σ = 2011392. Its totient is φ = 2000152.

The previous prime is 2005769. The next prime is 2005777. The reversal of 2005771 is 1775002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005771 - 2¹ = 2005769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (502848).

2^2005771 is an apocalyptic number.

2005771 is a deficient number, since it is larger than the sum of its proper divisors (5621).

2005771 is an equidigital number, since it uses as much as digits as its factorization.

2005771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 2005771 is about 1416.2524492477. The cubic root of 2005771 is about 126.1131720241.

The spelling of 2005771 in words is "two million, five thousand, seven hundred seventy-one".