2560209 has 4 divisors (see below), whose sum is σ = 3413616. Its totient is φ = 1706804.

The previous prime is 2560171. The next prime is 2560211. The reversal of 2560209 is 9020652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2560209 - 2¹⁶ = 2494673 is a prime.

It is a D-number.

It is a Curzon 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, 426699 + ... + 426704.

It is an arithmetic number, because the mean of its divisors is an integer number (853404).

2^2560209 is an apocalyptic number.

It is an amenable number.

2560209 is a deficient number, since it is larger than the sum of its proper divisors (853407).

2560209 is an equidigital number, since it uses as much as digits as its factorization.

2560209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853406.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2560209 is about 1600.0653111670. The cubic root of 2560209 is about 136.8017983930.

It can be divided in two parts, 2 and 560209, that added together give a triangular number (560211 = T₁₀₅₈).

The spelling of 2560209 in words is "two million, five hundred sixty thousand, two hundred nine".