8041681 has 2 divisors, whose sum is σ = 8041682. Its totient is φ = 8041680.

The previous prime is 8041669. The next prime is 8041703. The reversal of 8041681 is 1861408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 341056 = 2775^2 + 584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8041681 is a prime.

It is a super-2 number, since 2×8041681² = 129337266611522, which contains 22 as substring.

8041681 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8041181) 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, 4020840 + 4020841.

It is an arithmetic number, because the mean of its divisors is an integer number (4020841).

Almost surely, 2^8041681 is an apocalyptic number.

It is an amenable number.

8041681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8041681 is an equidigital number, since it uses as much as digits as its factorization.

8041681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 8041681 is about 2835.7857817543. The cubic root of 8041681 is about 200.3467401755.

It can be divided in two parts, 804 and 1681, that added together give a triangular number (2485 = T₇₀).

The spelling of 8041681 in words is "eight million, forty-one thousand, six hundred eighty-one".