859865 has 8 divisors (see below), whose sum is σ = 1054080. Its totient is φ = 673072.

The previous prime is 859861. The next prime is 859891. The reversal of 859865 is 568958.

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 859865 - 2² = 859861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (859861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 2064.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2⁸⁵⁹⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

859865 is a deficient number, since it is larger than the sum of its proper divisors (194215).

859865 is a wasteful number, since it uses less digits than its factorization.

859865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its digits is 86400, while the sum is 41.

The square root of 859865 is about 927.2890595710. The cubic root of 859865 is about 95.0918778720.

The spelling of 859865 in words is "eight hundred fifty-nine thousand, eight hundred sixty-five".