4239442321 has 3 divisors (see below), whose sum is σ = 4239507433. Its totient is φ = 4239377210.

The previous prime is 4239442301. The next prime is 4239442349. The reversal of 4239442321 is 1232449324.

The square root of 4239442321 is 65111.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4239442321 - 2¹¹ = 4239440273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4239442301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 32556 + ... + 97666.

Almost surely, 2^4239442321 is an apocalyptic number.

4239442321 is the 65111-st square number.

4239442321 is the 32556-th centered octagonal number.

It is an amenable number.

4239442321 is a deficient number, since it is larger than the sum of its proper divisors (65112).

4239442321 is an frugal number, since it uses more digits than its factorization.

4239442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130222 (or 65111 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The cubic root of 4239442321 is about 1618.4635028992.

The spelling of 4239442321 in words is "four billion, two hundred thirty-nine million, four hundred forty-two thousand, three hundred twenty-one".