2805505 has 4 divisors (see below), whose sum is σ = 3366612. Its totient is φ = 2244400.

The previous prime is 2805497. The next prime is 2805511. The reversal of 2805505 is 5055082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5055082 = 2 ⋅2527541.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 591361 = 1488^2 + 769^2 .

It is not a de Polignac number, because 2805505 - 2³ = 2805497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2805505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280546 + ... + 280555.

It is an arithmetic number, because the mean of its divisors is an integer number (841653).

2^2805505 is an apocalyptic number.

It is an amenable number.

2805505 is a deficient number, since it is larger than the sum of its proper divisors (561107).

2805505 is an equidigital number, since it uses as much as digits as its factorization.

2805505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561106.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2805505 is about 1674.9641787214. The cubic root of 2805505 is about 141.0382841233.

The spelling of 2805505 in words is "two million, eight hundred five thousand, five hundred five".