859217 has 4 divisors (see below), whose sum is σ = 873840. Its totient is φ = 844596.

The previous prime is 859213. The next prime is 859223. The reversal of 859217 is 712958.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712958 = 2 ⋅356479.

It is a cyclic number.

It is not a de Polignac number, because 859217 - 2² = 859213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859213) 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, 7223 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (218460).

2⁸⁵⁹²¹⁷ is an apocalyptic number.

It is an amenable number.

859217 is a deficient number, since it is larger than the sum of its proper divisors (14623).

859217 is a wasteful number, since it uses less digits than its factorization.

859217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14622.

The product of its digits is 5040, while the sum is 32.

The square root of 859217 is about 926.9395881070. The cubic root of 859217 is about 95.0679845778.

The spelling of 859217 in words is "eight hundred fifty-nine thousand, two hundred seventeen".