3881161 has 2 divisors, whose sum is σ = 3881162. Its totient is φ = 3881160.

The previous prime is 3881147. The next prime is 3881173. The reversal of 3881161 is 1611883.

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., 3825936 + 55225 = 1956^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881161 - 2¹³ = 3872969 is a prime.

It is not a weakly prime, because it can be changed into another prime (3881131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940580 + 1940581.

It is an arithmetic number, because the mean of its divisors is an integer number (1940581).

Almost surely, 2^3881161 is an apocalyptic number.

It is an amenable number.

3881161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881161 is an equidigital number, since it uses as much as digits as its factorization.

3881161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 3881161 is about 1970.0662425411. The cubic root of 3881161 is about 157.1522317508.

The spelling of 3881161 in words is "three million, eight hundred eighty-one thousand, one hundred sixty-one".