4123321 has 2 divisors, whose sum is σ = 4123322. Its totient is φ = 4123320.

The previous prime is 4123319. The next prime is 4123337. The reversal of 4123321 is 1233214.

It is a happy number.

It is an a-pointer prime, because the next prime (4123337) can be obtained adding 4123321 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 436921 = 1920^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 4123321 - 2¹ = 4123319 is a prime.

Together with 4123319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4123295 and 4123304.

It is not a weakly prime, because it can be changed into another prime (4123121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2061660 + 2061661.

It is an arithmetic number, because the mean of its divisors is an integer number (2061661).

Almost surely, 2^4123321 is an apocalyptic number.

It is an amenable number.

4123321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4123321 is an equidigital number, since it uses as much as digits as its factorization.

4123321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 16.

The square root of 4123321 is about 2030.5962178631. The cubic root of 4123321 is about 160.3549541524.

Adding to 4123321 its reverse (1233214), we get a palindrome (5356535).

It can be divided in two parts, 4123 and 321, that added together give a palindrome (4444).

The spelling of 4123321 in words is "four million, one hundred twenty-three thousand, three hundred twenty-one".