856516 has 6 divisors (see below), whose sum is σ = 1498910. Its totient is φ = 428256.

The previous prime is 856507. The next prime is 856519. The reversal of 856516 is 615658.

It can be written as a sum of positive squares in only one way, i.e., 484416 + 372100 = 696^2 + 610^2 .

It is not an unprimeable number, because it can be changed into a prime (856519) by changing a digit.

856516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107061 + ... + 107068.

2⁸⁵⁶⁵¹⁶ is an apocalyptic number.

It is an amenable number.

856516 is a deficient number, since it is larger than the sum of its proper divisors (642394).

856516 is a wasteful number, since it uses less digits than its factorization.

856516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214133 (or 214131 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 856516 is about 925.4814963034. The cubic root of 856516 is about 94.9682627134.

The spelling of 856516 in words is "eight hundred fifty-six thousand, five hundred sixteen".