3967841 has 2 divisors, whose sum is σ = 3967842. Its totient is φ = 3967840.

The previous prime is 3967837. The next prime is 3967871. The reversal of 3967841 is 1487693.

3967841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3150625 + 817216 = 1775^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 3967841 - 2² = 3967837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3967795 and 3967804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3967801) 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, 1983920 + 1983921.

It is an arithmetic number, because the mean of its divisors is an integer number (1983921).

Almost surely, 2^3967841 is an apocalyptic number.

It is an amenable number.

3967841 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967841 is an equidigital number, since it uses as much as digits as its factorization.

3967841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 3967841 is about 1991.9440253180. The cubic root of 3967841 is about 158.3135497596.

The spelling of 3967841 in words is "three million, nine hundred sixty-seven thousand, eight hundred forty-one".