11328921 has 24 divisors (see below), whose sum is σ = 17428320. Its totient is φ = 7070976.

The previous prime is 11328901. The next prime is 11328931. The reversal of 11328921 is 12982311.

It is not a de Polignac number, because 11328921 - 2¹⁴ = 11312537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11328901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16246 + ... + 16928.

It is an arithmetic number, because the mean of its divisors is an integer number (726180).

Almost surely, 2^11328921 is an apocalyptic number.

It is an amenable number.

11328921 is a deficient number, since it is larger than the sum of its proper divisors (6099399).

11328921 is a wasteful number, since it uses less digits than its factorization.

11328921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 802 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 11328921 is about 3365.8462531732. The cubic root of 11328921 is about 224.5929826821.

The spelling of 11328921 in words is "eleven million, three hundred twenty-eight thousand, nine hundred twenty-one".