2543321 has 16 divisors (see below), whose sum is σ = 2999040. Its totient is φ = 2131920.

The previous prime is 2543309. The next prime is 2543323. The reversal of 2543321 is 1233452.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2543321 - 2⁶ = 2543257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2543293 and 2543302.

It is not an unprimeable number, because it can be changed into a prime (2543323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8846 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (187440).

2^2543321 is an apocalyptic number.

It is an amenable number.

2543321 is a deficient number, since it is larger than the sum of its proper divisors (455719).

2543321 is a wasteful number, since it uses less digits than its factorization.

2543321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its digits is 720, while the sum is 20.

The square root of 2543321 is about 1594.7792950750. The cubic root of 2543321 is about 136.5003376753.

Adding to 2543321 its reverse (1233452), we get a palindrome (3776773).

The spelling of 2543321 in words is "two million, five hundred forty-three thousand, three hundred twenty-one".