9806221 has 8 divisors (see below), whose sum is σ = 10287360. Its totient is φ = 9336528.

The previous prime is 9806207. The next prime is 9806227. The reversal of 9806221 is 1226089.

It is a happy number.

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 9806221 - 2⁵ = 9806189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9806221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9806227) 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 in 7 ways as a sum of consecutive naturals, for example, 1081 + ... + 4558.

It is an arithmetic number, because the mean of its divisors is an integer number (1285920).

Almost surely, 2^9806221 is an apocalyptic number.

It is an amenable number.

9806221 is a deficient number, since it is larger than the sum of its proper divisors (481139).

9806221 is a wasteful number, since it uses less digits than its factorization.

9806221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 9806221 is about 3131.4886236421. The cubic root of 9806221 is about 214.0427681139.

The spelling of 9806221 in words is "nine million, eight hundred six thousand, two hundred twenty-one".