3921941 has 2 divisors, whose sum is σ = 3921942. Its totient is φ = 3921940.

The previous prime is 3921919. The next prime is 3921949. The reversal of 3921941 is 1491293.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 21316 = 1975^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921941 - 2⁶ = 3921877 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₂₇₈₀₃₉ and since 3921941 and 278039 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3921949) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960970 + 1960971.

It is an arithmetic number, because the mean of its divisors is an integer number (1960971).

Almost surely, 2^3921941 is an apocalyptic number.

It is an amenable number.

3921941 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921941 is an equidigital number, since it uses as much as digits as its factorization.

3921941 is an evil number, because the sum of its binary digits is even.

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

The square root of 3921941 is about 1980.3891031815. The cubic root of 3921941 is about 157.7007233386.

The spelling of 3921941 in words is "three million, nine hundred twenty-one thousand, nine hundred forty-one".