9641221 has 2 divisors, whose sum is σ = 9641222. Its totient is φ = 9641220.

The previous prime is 9641173. The next prime is 9641231. The reversal of 9641221 is 1221469.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 196 = 3105^2 + 14^2 .

It is an emirp because it is prime and its reverse (1221469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9641221 - 2¹⁵ = 9608453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9641231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820610 + 4820611.

It is an arithmetic number, because the mean of its divisors is an integer number (4820611).

Almost surely, 2^9641221 is an apocalyptic number.

It is an amenable number.

9641221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641221 is an equidigital number, since it uses as much as digits as its factorization.

9641221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 9641221 is about 3105.0315618364. The cubic root of 9641221 is about 212.8354728798.

The spelling of 9641221 in words is "nine million, six hundred forty-one thousand, two hundred twenty-one".