2560289 has 4 divisors (see below), whose sum is σ = 2629524. Its totient is φ = 2491056.

The previous prime is 2560279. The next prime is 2560297. The reversal of 2560289 is 9820652.

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 2274064 + 286225 = 1508^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560289 - 2⁴ = 2560273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2560219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34562 + ... + 34635.

It is an arithmetic number, because the mean of its divisors is an integer number (657381).

2^2560289 is an apocalyptic number.

It is an amenable number.

2560289 is a deficient number, since it is larger than the sum of its proper divisors (69235).

2560289 is an equidigital number, since it uses as much as digits as its factorization.

2560289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69234.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2560289 is about 1600.0903099513. The cubic root of 2560289 is about 136.8032232805.

The spelling of 2560289 in words is "two million, five hundred sixty thousand, two hundred eighty-nine".