4105681 has 2 divisors, whose sum is σ = 4105682. Its totient is φ = 4105680.

The previous prime is 4105679. The next prime is 4105711. The reversal of 4105681 is 1865014.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 25281 = 2020^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 4105681 - 2¹ = 4105679 is a prime.

It is a super-2 number, since 2×4105681² = 33713232947522, which contains 22 as substring.

Together with 4105679, it forms a pair of twin primes.

4105681 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4105601) 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, 2052840 + 2052841.

It is an arithmetic number, because the mean of its divisors is an integer number (2052841).

Almost surely, 2^4105681 is an apocalyptic number.

It is an amenable number.

4105681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4105681 is an equidigital number, since it uses as much as digits as its factorization.

4105681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 4105681 is about 2026.2480104864. The cubic root of 4105681 is about 160.1259555065.

The spelling of 4105681 in words is "four million, one hundred five thousand, six hundred eighty-one".