3871081 has 2 divisors, whose sum is σ = 3871082. Its totient is φ = 3871080.

The previous prime is 3871073. The next prime is 3871103. The reversal of 3871081 is 1801783.

It is a happy number.

3871081 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., 2128681 + 1742400 = 1459^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871081 - 2³ = 3871073 is a prime.

It is a super-2 number, since 2×3871081² = 29970536217122, which contains 22 as substring.

It is equal to p₂₇₄₆₉₀ and since 3871081 and 274690 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3871381) 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, 1935540 + 1935541.

It is an arithmetic number, because the mean of its divisors is an integer number (1935541).

Almost surely, 2^3871081 is an apocalyptic number.

It is an amenable number.

3871081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871081 is an equidigital number, since it uses as much as digits as its factorization.

3871081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 3871081 is about 1967.5062896977. The cubic root of 3871081 is about 157.0160639168.

The spelling of 3871081 in words is "three million, eight hundred seventy-one thousand, eighty-one".