2005775 has 6 divisors (see below), whose sum is σ = 2487192. Its totient is φ = 1604600.

The previous prime is 2005769. The next prime is 2005777. The reversal of 2005775 is 5775002.

It is not a de Polignac number, because 2005775 - 2⁸ = 2005519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005777) 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 5 ways as a sum of consecutive naturals, for example, 40091 + ... + 40140.

It is an arithmetic number, because the mean of its divisors is an integer number (414532).

2^2005775 is an apocalyptic number.

2005775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2005775 is a deficient number, since it is larger than the sum of its proper divisors (481417).

2005775 is an equidigital number, since it uses as much as digits as its factorization.

2005775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80241 (or 80236 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 2005775 is about 1416.2538614246. The cubic root of 2005775 is about 126.1132558575.

The spelling of 2005775 in words is "two million, five thousand, seven hundred seventy-five".