12975643 has 2 divisors, whose sum is σ = 12975644. Its totient is φ = 12975642.

The previous prime is 12975629. The next prime is 12975649. The reversal of 12975643 is 34657921.

It is a strong prime.

It is an emirp because it is prime and its reverse (34657921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12975643 is a prime.

It is a super-2 number, since 2×12975643² = 336734622526898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12975649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6487821 + 6487822.

It is an arithmetic number, because the mean of its divisors is an integer number (6487822).

Almost surely, 2^12975643 is an apocalyptic number.

12975643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12975643 is an equidigital number, since it uses as much as digits as its factorization.

12975643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 12975643 is about 3602.1719836787. The cubic root of 12975643 is about 234.9865270682.

The spelling of 12975643 in words is "twelve million, nine hundred seventy-five thousand, six hundred forty-three".