2565841 has 4 divisors (see below), whose sum is σ = 2598400. Its totient is φ = 2533284.

The previous prime is 2565809. The next prime is 2565847. The reversal of 2565841 is 1485652.

2565841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2565841 - 2⁵ = 2565809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16161 + ... + 16318.

It is an arithmetic number, because the mean of its divisors is an integer number (649600).

2^2565841 is an apocalyptic number.

It is an amenable number.

2565841 is a deficient number, since it is larger than the sum of its proper divisors (32559).

2565841 is an equidigital number, since it uses as much as digits as its factorization.

2565841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32558.

The product of its digits is 9600, while the sum is 31.

The square root of 2565841 is about 1601.8242725093. The cubic root of 2565841 is about 136.9020380550.

The spelling of 2565841 in words is "two million, five hundred sixty-five thousand, eight hundred forty-one".