4012321 has 2 divisors, whose sum is σ = 4012322. Its totient is φ = 4012320.

The previous prime is 4012297. The next prime is 4012339. The reversal of 4012321 is 1232104.

4012321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 12321 = 2000^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012321 - 2⁷ = 4012193 is a prime.

It is not a weakly prime, because it can be changed into another prime (4012381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006160 + 2006161.

It is an arithmetic number, because the mean of its divisors is an integer number (2006161).

Almost surely, 2^4012321 is an apocalyptic number.

It is an amenable number.

4012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012321 is an equidigital number, since it uses as much as digits as its factorization.

4012321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4012321 is about 2003.0778816611. The cubic root of 4012321 is about 158.9029245393.

Adding to 4012321 its reverse (1232104), we get a palindrome (5244425).

The spelling of 4012321 in words is "four million, twelve thousand, three hundred twenty-one".