9841021 has 2 divisors, whose sum is σ = 9841022. Its totient is φ = 9841020.

The previous prime is 9841019. The next prime is 9841037. The reversal of 9841021 is 1201489.

It is a happy number.

9841021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9672100 + 168921 = 3110^2 + 411^2 .

It is an emirp because it is prime and its reverse (1201489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9841021 - 2¹ = 9841019 is a prime.

Together with 9841019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9841081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920510 + 4920511.

It is an arithmetic number, because the mean of its divisors is an integer number (4920511).

Almost surely, 2^9841021 is an apocalyptic number.

It is an amenable number.

9841021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9841021 is an equidigital number, since it uses as much as digits as its factorization.

9841021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 9841021 is about 3137.0401655063. The cubic root of 9841021 is about 214.2956652099.

The spelling of 9841021 in words is "nine million, eight hundred forty-one thousand, twenty-one".