859247 has 4 divisors (see below), whose sum is σ = 867240. Its totient is φ = 851256.

The previous prime is 859223. The next prime is 859249. The reversal of 859247 is 742958.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742958 = 2 ⋅371479.

It is a cyclic number.

It is not a de Polignac number, because 859247 - 2¹⁰ = 858223 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 (859249) 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, 3833 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (216810).

2⁸⁵⁹²⁴⁷ is an apocalyptic number.

859247 is a deficient number, since it is larger than the sum of its proper divisors (7993).

859247 is a wasteful number, since it uses less digits than its factorization.

859247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7992.

The product of its digits is 20160, while the sum is 35.

The square root of 859247 is about 926.9557702501. The cubic root of 859247 is about 95.0690910140.

The spelling of 859247 in words is "eight hundred fifty-nine thousand, two hundred forty-seven".