858841 has 2 divisors, whose sum is σ = 858842. Its totient is φ = 858840.

The previous prime is 858833. The next prime is 858859. The reversal of 858841 is 148858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 48841 = 900^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 858841 - 2³ = 858833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858797 and 858806.

It is not a weakly prime, because it can be changed into another prime (858821) 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, 429420 + 429421.

It is an arithmetic number, because the mean of its divisors is an integer number (429421).

2⁸⁵⁸⁸⁴¹ is an apocalyptic number.

It is an amenable number.

858841 is a deficient number, since it is larger than the sum of its proper divisors (1).

858841 is an equidigital number, since it uses as much as digits as its factorization.

858841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 34.

The square root of 858841 is about 926.7367479495. The cubic root of 858841 is about 95.0541150595.

The spelling of 858841 in words is "eight hundred fifty-eight thousand, eight hundred forty-one".