2560909 has 4 divisors (see below), whose sum is σ = 2757916. Its totient is φ = 2363904.

The previous prime is 2560891. The next prime is 2560927. The reversal of 2560909 is 9090652.

2560909 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.

It is an interprime number because it is at equal distance from previous prime (2560891) and next prime (2560927).

It can be written as a sum of positive squares in 2 ways, for example, as 896809 + 1664100 = 947^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560909 - 2¹¹ = 2558861 is a prime.

It is a Duffinian number.

2560909 is a modest number, since divided by 909 gives 256 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560939) 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, 98484 + ... + 98509.

It is an arithmetic number, because the mean of its divisors is an integer number (689479).

2^2560909 is an apocalyptic number.

It is an amenable number.

2560909 is a deficient number, since it is larger than the sum of its proper divisors (197007).

2560909 is a wasteful number, since it uses less digits than its factorization.

2560909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197006.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 2560909 is about 1600.2840372884. The cubic root of 2560909 is about 136.8142651529.

The spelling of 2560909 in words is "two million, five hundred sixty thousand, nine hundred nine".