2565109 has 2 divisors, whose sum is σ = 2565110. Its totient is φ = 2565108.

The previous prime is 2565103. The next prime is 2565139. The reversal of 2565109 is 9015652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2387025 + 178084 = 1545^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565109 - 2¹⁷ = 2434037 is a prime.

2565109 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565103) 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, 1282554 + 1282555.

It is an arithmetic number, because the mean of its divisors is an integer number (1282555).

2^2565109 is an apocalyptic number.

It is an amenable number.

2565109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565109 is an equidigital number, since it uses as much as digits as its factorization.

2565109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2565109 is about 1601.5957667277. The cubic root of 2565109 is about 136.8890180454.

The spelling of 2565109 in words is "two million, five hundred sixty-five thousand, one hundred nine".