856411 has 2 divisors, whose sum is σ = 856412. Its totient is φ = 856410.

The previous prime is 856393. The next prime is 856417. The reversal of 856411 is 114658.

856411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856411 - 2¹¹ = 854363 is a prime.

It is a super-4 number, since 4×856411⁴ (a number of 25 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (856417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428205 + 428206.

It is an arithmetic number, because the mean of its divisors is an integer number (428206).

2⁸⁵⁶⁴¹¹ is an apocalyptic number.

856411 is a deficient number, since it is larger than the sum of its proper divisors (1).

856411 is an equidigital number, since it uses as much as digits as its factorization.

856411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 856411 is about 925.4247673366. The cubic root of 856411 is about 94.9643818460.

The spelling of 856411 in words is "eight hundred fifty-six thousand, four hundred eleven".