9645221 has 2 divisors, whose sum is σ = 9645222. Its totient is φ = 9645220.

The previous prime is 9645203. The next prime is 9645241. The reversal of 9645221 is 1225469.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8673025 + 972196 = 2945^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 9645221 - 2⁶ = 9645157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9645241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4822610 + 4822611.

It is an arithmetic number, because the mean of its divisors is an integer number (4822611).

Almost surely, 2^9645221 is an apocalyptic number.

It is an amenable number.

9645221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9645221 is an equidigital number, since it uses as much as digits as its factorization.

9645221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 9645221 is about 3105.6756108776. The cubic root of 9645221 is about 212.8649029068.

The spelling of 9645221 in words is "nine million, six hundred forty-five thousand, two hundred twenty-one".