3871481 has 2 divisors, whose sum is σ = 3871482. Its totient is φ = 3871480.

The previous prime is 3871447. The next prime is 3871499. The reversal of 3871481 is 1841783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2839225 + 1032256 = 1685^2 + 1016^2 .

It is an emirp because it is prime and its reverse (1841783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3871481 - 2¹⁰ = 3870457 is a prime.

It is a super-2 number, since 2×3871481² = 29976730266722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3871081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935740 + 1935741.

It is an arithmetic number, because the mean of its divisors is an integer number (1935741).

Almost surely, 2^3871481 is an apocalyptic number.

It is an amenable number.

3871481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871481 is an equidigital number, since it uses as much as digits as its factorization.

3871481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 32.

The square root of 3871481 is about 1967.6079385894. The cubic root of 3871481 is about 157.0214719034.

The spelling of 3871481 in words is "three million, eight hundred seventy-one thousand, four hundred eighty-one".