3920401 has 2 divisors, whose sum is σ = 3920402. Its totient is φ = 3920400.

The previous prime is 3920383. The next prime is 3920417. The reversal of 3920401 is 1040293.

3920401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 1980²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 1 = 1980^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 3920401 - 2⁹ = 3919889 is a prime.

It is not a weakly prime, because it can be changed into another prime (3920431) 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, 1960200 + 1960201.

It is an arithmetic number, because the mean of its divisors is an integer number (1960201).

Almost surely, 2^3920401 is an apocalyptic number.

It is an amenable number.

3920401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920401 is an equidigital number, since it uses as much as digits as its factorization.

3920401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 3920401 is about 1980.0002525252. Note that the first 3 decimals coincide. The cubic root of 3920401 is about 157.6800795716.

Adding to 3920401 its reverse (1040293), we get a palindrome (4960694).

The spelling of 3920401 in words is "three million, nine hundred twenty thousand, four hundred one".