4021339 has 4 divisors (see below), whose sum is σ = 4595824. Its totient is φ = 3446856.

The previous prime is 4021309. The next prime is 4021349. The reversal of 4021339 is 9331204.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4021339 - 2⁷ = 4021211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021309) 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, 287232 + ... + 287245.

It is an arithmetic number, because the mean of its divisors is an integer number (1148956).

Almost surely, 2^4021339 is an apocalyptic number.

4021339 is a deficient number, since it is larger than the sum of its proper divisors (574485).

4021339 is an equidigital number, since it uses as much as digits as its factorization.

4021339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574484.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 4021339 is about 2005.3276540256. The cubic root of 4021339 is about 159.0218843076.

The spelling of 4021339 in words is "four million, twenty-one thousand, three hundred thirty-nine".