859858 has 4 divisors (see below), whose sum is σ = 1289790. Its totient is φ = 429928.

The previous prime is 859853. The next prime is 859861. The reversal of 859858 is 858958.

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

It can be written as a sum of positive squares in only one way, i.e., 859329 + 529 = 927^2 + 23^2 .

It is not an unprimeable number, because it can be changed into a prime (859853) 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, 214963 + ... + 214966.

2⁸⁵⁹⁸⁵⁸ is an apocalyptic number.

859858 is a deficient number, since it is larger than the sum of its proper divisors (429932).

859858 is a wasteful number, since it uses less digits than its factorization.

859858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429931.

The product of its digits is 115200, while the sum is 43.

The square root of 859858 is about 927.2852851200. The cubic root of 859858 is about 95.0916198296.

Subtracting from 859858 its reverse (858958), we obtain a square (900 = 30²).

It can be divided in two parts, 8 and 59858, that multiplied together give a square (478864 = 692²).

The spelling of 859858 in words is "eight hundred fifty-nine thousand, eight hundred fifty-eight".