2865559 has 2 divisors, whose sum is σ = 2865560. Its totient is φ = 2865558.

The previous prime is 2865557. The next prime is 2865581. The reversal of 2865559 is 9555682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2865559 - 2¹ = 2865557 is a prime.

It is a super-2 number, since 2×2865559² = 16422856764962, which contains 22 as substring.

Together with 2865557, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2865557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1432779 + 1432780.

It is an arithmetic number, because the mean of its divisors is an integer number (1432780).

2^2865559 is an apocalyptic number.

2865559 is a deficient number, since it is larger than the sum of its proper divisors (1).

2865559 is an equidigital number, since it uses as much as digits as its factorization.

2865559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The square root of 2865559 is about 1692.7962074627. The cubic root of 2865559 is about 142.0375322333.

The spelling of 2865559 in words is "two million, eight hundred sixty-five thousand, five hundred fifty-nine".