2565709 has 2 divisors, whose sum is σ = 2565710. Its totient is φ = 2565708.

The previous prime is 2565701. The next prime is 2565713. The reversal of 2565709 is 9075652.

2565709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2490084 + 75625 = 1578^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565709 - 2³ = 2565701 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565701) 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 as a sum of consecutive naturals, namely, 1282854 + 1282855.

It is an arithmetic number, because the mean of its divisors is an integer number (1282855).

2^2565709 is an apocalyptic number.

It is an amenable number.

2565709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565709 is an equidigital number, since it uses as much as digits as its factorization.

2565709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 2565709 is about 1601.7830689578. The cubic root of 2565709 is about 136.8996903674.

The spelling of 2565709 in words is "two million, five hundred sixty-five thousand, seven hundred nine".