2565611 has 2 divisors, whose sum is σ = 2565612. Its totient is φ = 2565610.

The previous prime is 2565593. The next prime is 2565643. The reversal of 2565611 is 1165652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565611 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₁₈₇₅₁₄ and since 2565611 and 187514 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2565671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282805 + 1282806.

It is an arithmetic number, because the mean of its divisors is an integer number (1282806).

2^2565611 is an apocalyptic number.

2565611 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565611 is an equidigital number, since it uses as much as digits as its factorization.

2565611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 2565611 is about 1601.7524777568. The cubic root of 2565611 is about 136.8979473352.

The spelling of 2565611 in words is "two million, five hundred sixty-five thousand, six hundred eleven".