859869 has 8 divisors (see below), whose sum is σ = 1273920. Its totient is φ = 573228.

The previous prime is 859861. The next prime is 859891. The reversal of 859869 is 968958.

It is not a de Polignac number, because 859869 - 2³ = 859861 is a prime.

It is a super-2 number, since 2×859869² = 1478749394322, which contains 22 as substring.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15897 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (159240).

2⁸⁵⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

859869 is a deficient number, since it is larger than the sum of its proper divisors (414051).

859869 is a wasteful number, since it uses less digits than its factorization.

859869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31856 (or 31850 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 859869 is about 927.2912163932. The cubic root of 859869 is about 95.0920253242.

It can be divided in two parts, 859 and 869, that added together give a cube (1728 = 12³).

The spelling of 859869 in words is "eight hundred fifty-nine thousand, eight hundred sixty-nine".