3994121 has 2 divisors, whose sum is σ = 3994122. Its totient is φ = 3994120.

The previous prime is 3994103. The next prime is 3994147. The reversal of 3994121 is 1214993.

It is a happy number.

3994121 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., 3553225 + 440896 = 1885^2 + 664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3994121 is a prime.

It is not a weakly prime, because it can be changed into another prime (3994171) 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, 1997060 + 1997061.

It is an arithmetic number, because the mean of its divisors is an integer number (1997061).

Almost surely, 2^3994121 is an apocalyptic number.

It is an amenable number.

3994121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994121 is an equidigital number, since it uses as much as digits as its factorization.

3994121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 3994121 is about 1998.5297095615. The cubic root of 3994121 is about 158.6622976419.

The spelling of 3994121 in words is "three million, nine hundred ninety-four thousand, one hundred twenty-one".