Subtracting 12671 from its reverse (17621), we obtain a triangular number (4950 = T99).
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-12671 is a prime.
It is a Sophie Germain prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12671.
212671 is an apocalyptic number.
12671 is an equidigital number, since it uses as much as digits as its factorization.
12671 is an evil number, because the sum of its binary digits is even.
The square root of 12671 is about 112.5655364665. The cubic root of 12671 is about 23.3132934512.
The spelling of 12671 in words is "twelve thousand, six hundred seventy-one".