4231321 has 2 divisors, whose sum is σ = 4231322. Its totient is φ = 4231320.

The previous prime is 4231313. The next prime is 4231369. The reversal of 4231321 is 1231324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143296 + 2088025 = 1464^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 4231321 - 2³ = 4231313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4231295 and 4231304.

It is not a weakly prime, because it can be changed into another prime (4231391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115660 + 2115661.

It is an arithmetic number, because the mean of its divisors is an integer number (2115661).

Almost surely, 2^4231321 is an apocalyptic number.

It is an amenable number.

4231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4231321 is an equidigital number, since it uses as much as digits as its factorization.

4231321 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 4231321 is about 2057.0175011409. The cubic root of 4231321 is about 161.7429368159.

Adding to 4231321 its reverse (1231324), we get a palindrome (5462645).

The spelling of 4231321 in words is "four million, two hundred thirty-one thousand, three hundred twenty-one".