9860221 has 32 divisors (see below), whose sum is σ = 12960000. Its totient is φ = 7451136.

The previous prime is 9860219. The next prime is 9860231. The reversal of 9860221 is 1220689.

It is a happy number.

9860221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9860221 - 2¹ = 9860219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9860221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9860231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110745 + ... + 110833.

It is an arithmetic number, because the mean of its divisors is an integer number (405000).

Almost surely, 2^9860221 is an apocalyptic number.

It is an amenable number.

9860221 is a deficient number, since it is larger than the sum of its proper divisors (3099779).

9860221 is a wasteful number, since it uses less digits than its factorization.

9860221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 132 counting only the distinct ones).

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

The square root of 9860221 is about 3140.0988837933. The cubic root of 9860221 is about 214.4349395075.

The spelling of 9860221 in words is "nine million, eight hundred sixty thousand, two hundred twenty-one".