4239321 has 4 divisors (see below), whose sum is σ = 5652432. Its totient is φ = 2826212.

The previous prime is 4239293. The next prime is 4239331. The reversal of 4239321 is 1239324.

4239321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 4239321 - 2⁵ = 4239289 is a prime.

It is a D-number.

4239321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4239291 and 4239300.

It is not an unprimeable number, because it can be changed into a prime (4239331) 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, 706551 + ... + 706556.

It is an arithmetic number, because the mean of its divisors is an integer number (1413108).

Almost surely, 2^4239321 is an apocalyptic number.

It is an amenable number.

4239321 is a deficient number, since it is larger than the sum of its proper divisors (1413111).

4239321 is a wasteful number, since it uses less digits than its factorization.

4239321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413110.

The product of its digits is 1296, while the sum is 24.

The square root of 4239321 is about 2058.9611458209. The cubic root of 4239321 is about 161.8448064117.

It can be divided in two parts, 4239 and 321, that added together give a triangular number (4560 = T₉₅).

The spelling of 4239321 in words is "four million, two hundred thirty-nine thousand, three hundred twenty-one".