14021681 has 2 divisors, whose sum is σ = 14021682. Its totient is φ = 14021680.

The previous prime is 14021671. The next prime is 14021717. The reversal of 14021681 is 18612041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 4036081 = 3160^2 + 2009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14021681 is a prime.

It is a super-2 number, since 2×14021681² = 393215076131522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (14021671) 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, 7010840 + 7010841.

It is an arithmetic number, because the mean of its divisors is an integer number (7010841).

Almost surely, 2^14021681 is an apocalyptic number.

It is an amenable number.

14021681 is a deficient number, since it is larger than the sum of its proper divisors (1).

14021681 is an equidigital number, since it uses as much as digits as its factorization.

14021681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 14021681 is about 3744.5535114350. The cubic root of 14021681 is about 241.1385772347.

The spelling of 14021681 in words is "fourteen million, twenty-one thousand, six hundred eighty-one".