865089 has 12 divisors (see below), whose sum is σ = 1315600. Its totient is φ = 546264.

The previous prime is 865087. The next prime is 865091. The reversal of 865089 is 980568.

It is an interprime number because it is at equal distance from previous prime (865087) and next prime (865091).

It is not a de Polignac number, because 865089 - 2¹ = 865087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2359 + ... + 2700.

2⁸⁶⁵⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

865089 is a deficient number, since it is larger than the sum of its proper divisors (450511).

865089 is a wasteful number, since it uses less digits than its factorization.

865089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084 (or 5081 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 865089 is about 930.1016073527. The cubic root of 865089 is about 95.2840620525.

The spelling of 865089 in words is "eight hundred sixty-five thousand, eighty-nine".