4139321 has 4 divisors (see below), whose sum is σ = 4357200. Its totient is φ = 3921444.

The previous prime is 4139299. The next prime is 4139323. The reversal of 4139321 is 1239314.

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: 1239314 = 2 ⋅619657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4139321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4139323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108911 + ... + 108948.

It is an arithmetic number, because the mean of its divisors is an integer number (1089300).

Almost surely, 2^4139321 is an apocalyptic number.

It is an amenable number.

4139321 is a deficient number, since it is larger than the sum of its proper divisors (217879).

4139321 is a wasteful number, since it uses less digits than its factorization.

4139321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217878.

The product of its digits is 648, while the sum is 23.

The square root of 4139321 is about 2034.5321329485. The cubic root of 4139321 is about 160.5620984914.

It can be divided in two parts, 41393 and 21, that added together give a palindrome (41414).

The spelling of 4139321 in words is "four million, one hundred thirty-nine thousand, three hundred twenty-one".