4006321 has 16 divisors (see below), whose sum is σ = 4766400. Its totient is φ = 3326400.

The previous prime is 4006319. The next prime is 4006333. The reversal of 4006321 is 1236004.

4006321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4006321 - 2¹ = 4006319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4006295 and 4006304.

It is not an unprimeable number, because it can be changed into a prime (4006351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5731 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (297900).

Almost surely, 2^4006321 is an apocalyptic number.

It is an amenable number.

4006321 is a deficient number, since it is larger than the sum of its proper divisors (760079).

4006321 is a wasteful number, since it uses less digits than its factorization.

4006321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 4006321 is about 2001.5796261953. The cubic root of 4006321 is about 158.8236775409.

The spelling of 4006321 in words is "four million, six thousand, three hundred twenty-one".