9221420 has 48 divisors (see below), whose sum is σ = 21591360. Its totient is φ = 3284736.

The previous prime is 9221389. The next prime is 9221423. The reversal of 9221420 is 241229.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 9221392 and 9221401.

It is not an unprimeable number, because it can be changed into a prime (9221423) 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 15 ways as a sum of consecutive naturals, for example, 6929 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (449820).

Almost surely, 2^9221420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9221420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10795680).

9221420 is an abundant number, since it is smaller than the sum of its proper divisors (12369940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9221420 is a wasteful number, since it uses less digits than its factorization.

9221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 9221420 is about 3036.6791071827. The cubic root of 9221420 is about 209.7004042297.

Adding to 9221420 its reverse (241229), we get a palindrome (9462649).

It can be divided in two parts, 92 and 21420, that added together give a palindrome (21512).

The spelling of 9221420 in words is "nine million, two hundred twenty-one thousand, four hundred twenty".