2160321 has 16 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1361360.

The previous prime is 2160311. The next prime is 2160337. The reversal of 2160321 is 1230612.

It is a cyclic number.

It is not a de Polignac number, because 2160321 - 2⁹ = 2159809 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2160321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8920 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2^2160321 is an apocalyptic number.

2160321 is the 786-th nonagonal number.

It is an amenable number.

2160321 is a deficient number, since it is larger than the sum of its proper divisors (880959).

2160321 is a wasteful number, since it uses less digits than its factorization.

2160321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2160321 is about 1469.8030480306. The cubic root of 2160321 is about 129.2724845434.

Adding to 2160321 its reverse (1230612), we get a palindrome (3390933).

The spelling of 2160321 in words is "two million, one hundred sixty thousand, three hundred twenty-one".