2265565 has 8 divisors (see below), whose sum is σ = 2744280. Its totient is φ = 1795392.

The previous prime is 2265551. The next prime is 2265581. The reversal of 2265565 is 5655622.

2265565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 344569 + 1920996 = 587^2 + 1386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2265565 - 2¹¹ = 2263517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (343035).

2^2265565 is an apocalyptic number.

It is an amenable number.

2265565 is a deficient number, since it is larger than the sum of its proper divisors (478715).

2265565 is a wasteful number, since it uses less digits than its factorization.

2265565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271.

The product of its digits is 18000, while the sum is 31.

The square root of 2265565 is about 1505.1793913019. The cubic root of 2265565 is about 131.3385373896.

The spelling of 2265565 in words is "two million, two hundred sixty-five thousand, five hundred sixty-five".