9681221 has 8 divisors (see below), whose sum is σ = 10584000. Its totient is φ = 8782240.

The previous prime is 9681193. The next prime is 9681223. The reversal of 9681221 is 1221869.

9681221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9681221 - 2¹⁰ = 9680197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8705 + ... + 9753.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^9681221 is an apocalyptic number.

It is an amenable number.

9681221 is a deficient number, since it is larger than the sum of its proper divisors (902779).

9681221 is a wasteful number, since it uses less digits than its factorization.

9681221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 1728, while the sum is 29.

The square root of 9681221 is about 3111.4660531653. The cubic root of 9681221 is about 213.1294077227.

The spelling of 9681221 in words is "nine million, six hundred eighty-one thousand, two hundred twenty-one".