4003321 has 4 divisors (see below), whose sum is σ = 4575232. Its totient is φ = 3431412.

The previous prime is 4003297. The next prime is 4003333. The reversal of 4003321 is 1233004.

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 4003321 - 2¹³ = 3995129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4003361) 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, 285945 + ... + 285958.

It is an arithmetic number, because the mean of its divisors is an integer number (1143808).

Almost surely, 2^4003321 is an apocalyptic number.

It is an amenable number.

4003321 is a deficient number, since it is larger than the sum of its proper divisors (571911).

4003321 is an equidigital number, since it uses as much as digits as its factorization.

4003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571910.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 4003321 is about 2000.8300777427. The cubic root of 4003321 is about 158.7840243685.

Adding to 4003321 its reverse (1233004), we get a palindrome (5236325).

It can be divided in two parts, 400 and 3321, that added together give a square (3721 = 61²).

The spelling of 4003321 in words is "four million, three thousand, three hundred twenty-one".