859366 has 4 divisors (see below), whose sum is σ = 1289052. Its totient is φ = 429682.

The previous prime is 859363. The next prime is 859373. The reversal of 859366 is 663958.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214840 + ... + 214843.

It is an arithmetic number, because the mean of its divisors is an integer number (322263).

859366 is a Friedman number, since it can be written as (63-8)*5^6-9, using all its digits and the basic arithmetic operations.

2⁸⁵⁹³⁶⁶ is an apocalyptic number.

859366 is a deficient number, since it is larger than the sum of its proper divisors (429686).

859366 is a wasteful number, since it uses less digits than its factorization.

859366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429685.

The product of its digits is 38880, while the sum is 37.

The square root of 859366 is about 927.0199566352. The cubic root of 859366 is about 95.0734796238.

Subtracting from 859366 its sum of digits (37), we obtain a square (859329 = 927²).

It can be divided in two parts, 859 and 366, that added together give a triangular number (1225 = T₄₉).

The spelling of 859366 in words is "eight hundred fifty-nine thousand, three hundred sixty-six".