3904321 has 2 divisors, whose sum is σ = 3904322. Its totient is φ = 3904320.

The previous prime is 3904309. The next prime is 3904333. The reversal of 3904321 is 1234093.

3904321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3904309) and next prime (3904333).

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 1132096 = 1665^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 3904321 - 2⁵ = 3904289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3904292 and 3904301.

It is not a weakly prime, because it can be changed into another prime (3904921) 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 as a sum of consecutive naturals, namely, 1952160 + 1952161.

It is an arithmetic number, because the mean of its divisors is an integer number (1952161).

Almost surely, 2^3904321 is an apocalyptic number.

It is an amenable number.

3904321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3904321 is an equidigital number, since it uses as much as digits as its factorization.

3904321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3904321 is about 1975.9354746550. The cubic root of 3904321 is about 157.4642028328.

It can be divided in two parts, 3904 and 321, that added together give a square (4225 = 65²).

The spelling of 3904321 in words is "three million, nine hundred four thousand, three hundred twenty-one".