9321921 has 24 divisors (see below), whose sum is σ = 15591680. Its totient is φ = 5256576.

The previous prime is 9321919. The next prime is 9321929. The reversal of 9321921 is 1291239.

9321921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9321921 - 2¹ = 9321919 is a prime.

It is a super-2 number, since 2×9321921² = 173796422260482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9321929) 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, 4041 + ... + 5913.

Almost surely, 2^9321921 is an apocalyptic number.

It is an amenable number.

9321921 is a deficient number, since it is larger than the sum of its proper divisors (6269759).

9321921 is a wasteful number, since it uses less digits than its factorization.

9321921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1962 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 9321921 is about 3053.1821105201. The cubic root of 9321921 is about 210.4594701581.

The spelling of 9321921 in words is "nine million, three hundred twenty-one thousand, nine hundred twenty-one".