841085561 has 4 divisors (see below), whose sum is σ = 841980324. Its totient is φ = 840190800.

The previous prime is 841085543. The next prime is 841085669. The reversal of 841085561 is 165580148.

841085561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 682829161 + 158256400 = 26131^2 + 12580^2 .

It is a cyclic number.

It is not a de Polignac number, because 841085561 - 2²² = 836891257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (841085501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445970 + ... + 447851.

It is an arithmetic number, because the mean of its divisors is an integer number (210495081).

Almost surely, 2^841085561 is an apocalyptic number.

It is an amenable number.

841085561 is a deficient number, since it is larger than the sum of its proper divisors (894763).

841085561 is an equidigital number, since it uses as much as digits as its factorization.

841085561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894762.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 841085561 is about 29001.4751521367. The cubic root of 841085561 is about 943.9450770168.

The spelling of 841085561 in words is "eight hundred forty-one million, eighty-five thousand, five hundred sixty-one".