4159681 has 2 divisors, whose sum is σ = 4159682. Its totient is φ = 4159680.

The previous prime is 4159669. The next prime is 4159693. The reversal of 4159681 is 1869514.

It is a balanced prime because it is at equal distance from previous prime (4159669) and next prime (4159693).

It can be written as a sum of positive squares in only one way, i.e., 3240000 + 919681 = 1800^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 4159681 - 2⁷ = 4159553 is a prime.

It is a super-2 number, since 2×4159681² = 34605892043522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4159601) 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, 2079840 + 2079841.

It is an arithmetic number, because the mean of its divisors is an integer number (2079841).

Almost surely, 2^4159681 is an apocalyptic number.

It is an amenable number.

4159681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4159681 is an equidigital number, since it uses as much as digits as its factorization.

4159681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 4159681 is about 2039.5296026290. The cubic root of 4159681 is about 160.8249193041.

The spelling of 4159681 in words is "four million, one hundred fifty-nine thousand, six hundred eighty-one".