8841221 has 2 divisors, whose sum is σ = 8841222. Its totient is φ = 8841220.

The previous prime is 8841197. The next prime is 8841227. The reversal of 8841221 is 1221488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 1876900 = 2639^2 + 1370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8841221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8841227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4420610 + 4420611.

It is an arithmetic number, because the mean of its divisors is an integer number (4420611).

Almost surely, 2^8841221 is an apocalyptic number.

It is an amenable number.

8841221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8841221 is an equidigital number, since it uses as much as digits as its factorization.

8841221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 8841221 is about 2973.4190757443. The cubic root of 8841221 is about 206.7778818098. Note that the first 3 decimals are identical.

The spelling of 8841221 in words is "eight million, eight hundred forty-one thousand, two hundred twenty-one".