2566559 has 8 divisors (see below), whose sum is σ = 2676240. Its totient is φ = 2459200.

The previous prime is 2566549. The next prime is 2566561. The reversal of 2566559 is 9556652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2566559 - 2¹² = 2562463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566519) 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 in 7 ways as a sum of consecutive naturals, for example, 1889 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (334530).

2^2566559 is an apocalyptic number.

2566559 is a deficient number, since it is larger than the sum of its proper divisors (109681).

2566559 is a wasteful number, since it uses less digits than its factorization.

2566559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161.

The product of its digits is 81000, while the sum is 38.

The square root of 2566559 is about 1602.0483762983. The cubic root of 2566559 is about 136.9148066425.

It can be divided in two parts, 2566 and 559, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2566559 in words is "two million, five hundred sixty-six thousand, five hundred fifty-nine".