3185881 has 2 divisors, whose sum is σ = 3185882. Its totient is φ = 3185880.

The previous prime is 3185873. The next prime is 3185887. The reversal of 3185881 is 1885813.

3185881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2673225 + 512656 = 1635^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 3185881 - 2³ = 3185873 is a prime.

It is a super-2 number, since 2×3185881² = 20299675492322, which contains 22 as substring.

3185881 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3185887) 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, 1592940 + 1592941.

It is an arithmetic number, because the mean of its divisors is an integer number (1592941).

Almost surely, 2^3185881 is an apocalyptic number.

It is an amenable number.

3185881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3185881 is an equidigital number, since it uses as much as digits as its factorization.

3185881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The square root of 3185881 is about 1784.9036388556. The cubic root of 3185881 is about 147.1442119100.

The spelling of 3185881 in words is "three million, one hundred eighty-five thousand, eight hundred eighty-one".