856133 has 2 divisors, whose sum is σ = 856134. Its totient is φ = 856132.

The previous prime is 856117. The next prime is 856139. The reversal of 856133 is 331658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806404 + 49729 = 898^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 856133 - 2⁴ = 856117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428066 + 428067.

It is an arithmetic number, because the mean of its divisors is an integer number (428067).

2⁸⁵⁶¹³³ is an apocalyptic number.

It is an amenable number.

856133 is a deficient number, since it is larger than the sum of its proper divisors (1).

856133 is an equidigital number, since it uses as much as digits as its factorization.

856133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 856133 is about 925.2745538487. The cubic root of 856133 is about 94.9541052555.

It can be divided in two parts, 856 and 133, that added together give a palindrome (989).

The spelling of 856133 in words is "eight hundred fifty-six thousand, one hundred thirty-three".