2865659 has 2 divisors, whose sum is σ = 2865660. Its totient is φ = 2865658.

The previous prime is 2865641. The next prime is 2865661. The reversal of 2865659 is 9565682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2865659 - 2²⁰ = 1817083 is a prime.

Together with 2865661, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2²⁰ + 8³ + 6⁶ + 5⁶ + 6⁸ + 5⁶ + 9⁵ .

It is not a weakly prime, because it can be changed into another prime (2865679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1432829 + 1432830.

It is an arithmetic number, because the mean of its divisors is an integer number (1432830).

2^2865659 is an apocalyptic number.

2865659 is a deficient number, since it is larger than the sum of its proper divisors (1).

2865659 is an equidigital number, since it uses as much as digits as its factorization.

2865659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 2865659 is about 1692.8257441332. The cubic root of 2865659 is about 142.0391844517.

The spelling of 2865659 in words is "two million, eight hundred sixty-five thousand, six hundred fifty-nine".