2085565 has 4 divisors (see below), whose sum is σ = 2502684. Its totient is φ = 1668448.

The previous prime is 2085539. The next prime is 2085569. The reversal of 2085565 is 5655802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5655802 = 2 ⋅2827901.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 806404 = 1131^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 2085565 - 2⁹ = 2085053 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 (2085569) 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, 208552 + ... + 208561.

It is an arithmetic number, because the mean of its divisors is an integer number (625671).

2^2085565 is an apocalyptic number.

It is an amenable number.

2085565 is a deficient number, since it is larger than the sum of its proper divisors (417119).

2085565 is an equidigital number, since it uses as much as digits as its factorization.

2085565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417118.

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

The square root of 2085565 is about 1444.1485380666. The cubic root of 2085565 is about 127.7638263841.

The spelling of 2085565 in words is "two million, eighty-five thousand, five hundred sixty-five".