11716921 has 8 divisors (see below), whose sum is σ = 11916800. Its totient is φ = 11518848.

The previous prime is 11716897. The next prime is 11716933. The reversal of 11716921 is 12961711.

11716921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11716921 - 2⁵ = 11716889 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 11716921.

It is not an unprimeable number, because it can be changed into a prime (11716981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19000 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (1489600).

Almost surely, 2^11716921 is an apocalyptic number.

It is an amenable number.

11716921 is a deficient number, since it is larger than the sum of its proper divisors (199879).

11716921 is an equidigital number, since it uses as much as digits as its factorization.

11716921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its digits is 756, while the sum is 28.

The square root of 11716921 is about 3422.9988314342. The cubic root of 11716921 is about 227.1282565521.

The spelling of 11716921 in words is "eleven million, seven hundred sixteen thousand, nine hundred twenty-one".