856241 has 2 divisors, whose sum is σ = 856242. Its totient is φ = 856240.

The previous prime is 856237. The next prime is 856249. The reversal of 856241 is 142658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519841 + 336400 = 721^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 856241 - 2² = 856237 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856241.

It is not a weakly prime, because it can be changed into another prime (856249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428120 + 428121.

It is an arithmetic number, because the mean of its divisors is an integer number (428121).

2⁸⁵⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

856241 is a deficient number, since it is larger than the sum of its proper divisors (1).

856241 is an equidigital number, since it uses as much as digits as its factorization.

856241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 856241 is about 925.3329130643. The cubic root of 856241 is about 94.9580978642.

Adding to 856241 its reverse (142658), we get a palindrome (998899).

The spelling of 856241 in words is "eight hundred fifty-six thousand, two hundred forty-one".