859439 has 4 divisors (see below), whose sum is σ = 982224.
Its totient is φ = 736656.
The previous prime is 859433. The next prime is 859447. The reversal of 859439 is 934958.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934958 = 2 ⋅467479.
It is a cyclic number.
It is not a de Polignac number, because 859439 - 24 = 859423 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (859433) 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, 61382 + ... + 61395.
It is an arithmetic number, because the mean of its divisors is an integer number (245556).
2859439 is an apocalyptic number.
859439 is a deficient number, since it is larger than the sum of its proper divisors (122785).
859439 is a wasteful number, since it uses less digits than its factorization.
859439 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 122784.
The product of its digits is 38880, while the sum is 38.
The square root of 859439 is about 927.0593292773.
The cubic root of 859439 is about 95.0761715958.
The spelling of 859439 in words is "eight hundred fifty-nine thousand, four hundred thirty-nine".