859385 has 4 divisors (see below), whose sum is σ = 1031268. Its totient is φ = 687504.

The previous prime is 859381. The next prime is 859393. The reversal of 859385 is 583958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583958 = 2 ⋅291979.

It can be written as a sum of positive squares in 2 ways, for example, as 434281 + 425104 = 659^2 + 652^2 .

It is a cyclic number.

It is not a de Polignac number, because 859385 - 2² = 859381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (859381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85934 + ... + 85943.

It is an arithmetic number, because the mean of its divisors is an integer number (257817).

2⁸⁵⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

859385 is a deficient number, since it is larger than the sum of its proper divisors (171883).

859385 is a wasteful number, since it uses less digits than its factorization.

859385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171882.

The product of its digits is 43200, while the sum is 38.

The square root of 859385 is about 927.0302044702. The cubic root of 859385 is about 95.0741802888.

The spelling of 859385 in words is "eight hundred fifty-nine thousand, three hundred eighty-five".