12743681 has 2 divisors, whose sum is σ = 12743682. Its totient is φ = 12743680.

The previous prime is 12743677. The next prime is 12743701. The reversal of 12743681 is 18634721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10758400 + 1985281 = 3280^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 12743681 - 2² = 12743677 is a prime.

It is a super-2 number, since 2×12743681² = 324802810859522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12743611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6371840 + 6371841.

It is an arithmetic number, because the mean of its divisors is an integer number (6371841).

Almost surely, 2^12743681 is an apocalyptic number.

It is an amenable number.

12743681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12743681 is an equidigital number, since it uses as much as digits as its factorization.

12743681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 12743681 is about 3569.8292676261. The cubic root of 12743681 is about 233.5778359941.

The spelling of 12743681 in words is "twelve million, seven hundred forty-three thousand, six hundred eighty-one".