859139 has 4 divisors (see below), whose sum is σ = 866856. Its totient is φ = 851424.

The previous prime is 859121. The next prime is 859181. The reversal of 859139 is 931958.

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

It is a cyclic number.

It is not a de Polignac number, because 859139 - 2⁸ = 858883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 859099 and 859108.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 859139.

It is not an unprimeable number, because it can be changed into a prime (859109) 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, 3689 + ... + 3914.

It is an arithmetic number, because the mean of its divisors is an integer number (216714).

2⁸⁵⁹¹³⁹ is an apocalyptic number.

859139 is a deficient number, since it is larger than the sum of its proper divisors (7717).

859139 is a wasteful number, since it uses less digits than its factorization.

859139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716.

The product of its digits is 9720, while the sum is 35.

The square root of 859139 is about 926.8975132128. The cubic root of 859139 is about 95.0651077232.

The spelling of 859139 in words is "eight hundred fifty-nine thousand, one hundred thirty-nine".