11720321 has 16 divisors (see below), whose sum is σ = 12960000. Its totient is φ = 10555776.

The previous prime is 11720297. The next prime is 11720323. The reversal of 11720321 is 12302711.

11720321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11720321 - 2⁶ = 11720257 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 11720321.

It is not an unprimeable number, because it can be changed into a prime (11720323) 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, 48920 + ... + 49158.

It is an arithmetic number, because the mean of its divisors is an integer number (810000).

Almost surely, 2^11720321 is an apocalyptic number.

It is an amenable number.

11720321 is a deficient number, since it is larger than the sum of its proper divisors (1239679).

11720321 is a wasteful number, since it uses less digits than its factorization.

11720321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 11720321 is about 3423.4954359543. The cubic root of 11720321 is about 227.1502236823.

The spelling of 11720321 in words is "eleven million, seven hundred twenty thousand, three hundred twenty-one".