12547943 has 4 divisors (see below), whose sum is σ = 12760680. Its totient is φ = 12335208.

The previous prime is 12547939. The next prime is 12547957. The reversal of 12547943 is 34974521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34974521 = 4793 ⋅7297.

It is a cyclic number.

It is not a de Polignac number, because 12547943 - 2² = 12547939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106280 + ... + 106397.

It is an arithmetic number, because the mean of its divisors is an integer number (3190170).

Almost surely, 2^12547943 is an apocalyptic number.

12547943 is a deficient number, since it is larger than the sum of its proper divisors (212737).

12547943 is an equidigital number, since it uses as much as digits as its factorization.

12547943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212736.

The product of its digits is 30240, while the sum is 35.

The square root of 12547943 is about 3542.3075812244. The cubic root of 12547943 is about 232.3757720750.

The spelling of 12547943 in words is "twelve million, five hundred forty-seven thousand, nine hundred forty-three".