4321321 has 4 divisors (see below), whose sum is σ = 4413312. Its totient is φ = 4229332.

The previous prime is 4321259. The next prime is 4321327. The reversal of 4321321 is 1231234.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1231234 = 2 ⋅615617.

It is a cyclic number.

It is not a de Polignac number, because 4321321 - 2¹³ = 4313129 is a prime.

It is a Duffinian number.

4321321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4321295 and 4321304.

It is not an unprimeable number, because it can be changed into a prime (4321327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45925 + ... + 46018.

It is an arithmetic number, because the mean of its divisors is an integer number (1103328).

Almost surely, 2^4321321 is an apocalyptic number.

It is an amenable number.

4321321 is a deficient number, since it is larger than the sum of its proper divisors (91991).

4321321 is an equidigital number, since it uses as much as digits as its factorization.

4321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91990.

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

The square root of 4321321 is about 2078.7787280035. The cubic root of 4321321 is about 162.8816559783.

Adding to 4321321 its reverse (1231234), we get a palindrome (5552555).

It can be divided in two parts, 43213 and 21, that added together give a palindrome (43234).

The spelling of 4321321 in words is "four million, three hundred twenty-one thousand, three hundred twenty-one".