2400565 has 4 divisors (see below), whose sum is σ = 2880684. Its totient is φ = 1920448.

The previous prime is 2400557. The next prime is 2400571. The reversal of 2400565 is 5650042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1094116 + 1306449 = 1046^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400565 - 2³ = 2400557 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 240052 + ... + 240061.

It is an arithmetic number, because the mean of its divisors is an integer number (720171).

2^2400565 is an apocalyptic number.

It is an amenable number.

2400565 is a deficient number, since it is larger than the sum of its proper divisors (480119).

2400565 is an equidigital number, since it uses as much as digits as its factorization.

2400565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480118.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2400565 is about 1549.3756807179. The cubic root of 2400565 is about 133.8970955703.

The spelling of 2400565 in words is "two million, four hundred thousand, five hundred sixty-five".