859859 has 16 divisors (see below), whose sum is σ = 1155840. Its totient is φ = 617760.

The previous prime is 859853. The next prime is 859861. The reversal of 859859 is 958958.

It is not a de Polignac number, because 859859 - 2⁸ = 859603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (859853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (72240).

2⁸⁵⁹⁸⁵⁹ is an apocalyptic number.

859859 is a deficient number, since it is larger than the sum of its proper divisors (295981).

859859 is a wasteful number, since it uses less digits than its factorization.

859859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its digits is 129600, while the sum is 44.

The square root of 859859 is about 927.2858243282. The cubic root of 859859 is about 95.0916566929.

Subtracting 859859 from its reverse (958958), we obtain a palindrome (99099).

The spelling of 859859 in words is "eight hundred fifty-nine thousand, eight hundred fifty-nine".