856318241 has 2 divisors, whose sum is σ = 856318242. Its totient is φ = 856318240.

The previous prime is 856318193. The next prime is 856318259. The reversal of 856318241 is 142813658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669722641 + 186595600 = 25879^2 + 13660^2 .

It is a cyclic number.

It is not a de Polignac number, because 856318241 - 2¹⁴ = 856301857 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 856318195 and 856318204.

It is not a weakly prime, because it can be changed into another prime (856318741) 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 as a sum of consecutive naturals, namely, 428159120 + 428159121.

It is an arithmetic number, because the mean of its divisors is an integer number (428159121).

Almost surely, 2^856318241 is an apocalyptic number.

It is an amenable number.

856318241 is a deficient number, since it is larger than the sum of its proper divisors (1).

856318241 is an equidigital number, since it uses as much as digits as its factorization.

856318241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 856318241 is about 29262.9157979857. The cubic root of 856318241 is about 949.6095314986.

The spelling of 856318241 in words is "eight hundred fifty-six million, three hundred eighteen thousand, two hundred forty-one".