856317 has 24 divisors (see below), whose sum is σ = 1438528. Its totient is φ = 443520.

The previous prime is 856309. The next prime is 856333. The reversal of 856317 is 713658.

It is not a de Polignac number, because 856317 - 2³ = 856309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2373 + ... + 2709.

2⁸⁵⁶³¹⁷ is an apocalyptic number.

It is an amenable number.

856317 is a deficient number, since it is larger than the sum of its proper divisors (582211).

856317 is a wasteful number, since it uses less digits than its factorization.

856317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 358 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 856317 is about 925.3739784541. The cubic root of 856317 is about 94.9609072765.

The spelling of 856317 in words is "eight hundred fifty-six thousand, three hundred seventeen".