9421720 has 192 divisors, whose sum is σ = 29548800. Its totient is φ = 2661120.

The previous prime is 9421691. The next prime is 9421729. The reversal of 9421720 is 271249.

9421720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9421729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 409629 + ... + 409651.

It is an arithmetic number, because the mean of its divisors is an integer number (153900).

Almost surely, 2^9421720 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 9421720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14774400).

9421720 is an abundant number, since it is smaller than the sum of its proper divisors (20127080).

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

9421720 is a wasteful number, since it uses less digits than its factorization.

9421720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 9421720 is about 3069.4820409965. The cubic root of 9421720 is about 211.2078542954.

Adding to 9421720 its reverse (271249), we get a palindrome (9692969).

It can be divided in two parts, 942 and 1720, that added together give a palindrome (2662).

The spelling of 9421720 in words is "nine million, four hundred twenty-one thousand, seven hundred twenty".