9621216 has 72 divisors (see below), whose sum is σ = 29857464. Its totient is φ = 2914560.

The previous prime is 9621203. The next prime is 9621223. The reversal of 9621216 is 6121269.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 9621216.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1650 + ... + 4686.

It is an arithmetic number, because the mean of its divisors is an integer number (414687).

Almost surely, 2^9621216 is an apocalyptic number.

9621216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9621216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14928732).

9621216 is an abundant number, since it is smaller than the sum of its proper divisors (20236248).

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

9621216 is a wasteful number, since it uses less digits than its factorization.

9621216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3053 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 9621216 is about 3101.8085047275. The cubic root of 9621216 is about 212.6881636709.

It can be divided in two parts, 96 and 21216, that added together give a palindrome (21312).

The spelling of 9621216 in words is "nine million, six hundred twenty-one thousand, two hundred sixteen".