2805565 has 16 divisors (see below), whose sum is σ = 3905280. Its totient is φ = 1895040.

The previous prime is 2805533. The next prime is 2805577. The reversal of 2805565 is 5655082.

It is not a de Polignac number, because 2805565 - 2⁵ = 2805533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1921 + ... + 3049.

It is an arithmetic number, because the mean of its divisors is an integer number (244080).

2^2805565 is an apocalyptic number.

It is an amenable number.

2805565 is a deficient number, since it is larger than the sum of its proper divisors (1099715).

2805565 is a wasteful number, since it uses less digits than its factorization.

2805565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2805565 is about 1674.9820894565. The cubic root of 2805565 is about 141.0392895556.

The spelling of 2805565 in words is "two million, eight hundred five thousand, five hundred sixty-five".