9891241 has 2 divisors, whose sum is σ = 9891242. Its totient is φ = 9891240.

The previous prime is 9891239. The next prime is 9891251. The reversal of 9891241 is 1421989.

9891241 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., 6651241 + 3240000 = 2579^2 + 1800^2 .

It is an emirp because it is prime and its reverse (1421989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9891241 - 2¹ = 9891239 is a prime.

Together with 9891239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9891197 and 9891206.

It is not a weakly prime, because it can be changed into another prime (9891221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945620 + 4945621.

It is an arithmetic number, because the mean of its divisors is an integer number (4945621).

Almost surely, 2^9891241 is an apocalyptic number.

It is an amenable number.

9891241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9891241 is an equidigital number, since it uses as much as digits as its factorization.

9891241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 9891241 is about 3145.0343400351. The cubic root of 9891241 is about 214.6595730309.

The spelling of 9891241 in words is "nine million, eight hundred ninety-one thousand, two hundred forty-one".