12928543 has 4 divisors (see below), whose sum is σ = 12947688. Its totient is φ = 12909400.

The previous prime is 12928537. The next prime is 12928549. The reversal of 12928543 is 34582921.

12928543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34582921 = 67 ⋅516163.

It is an interprime number because it is at equal distance from previous prime (12928537) and next prime (12928549).

It is a cyclic number.

It is not a de Polignac number, because 12928543 - 2⁵ = 12928511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12928499 and 12928508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12928549) 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, 8521 + ... + 9922.

It is an arithmetic number, because the mean of its divisors is an integer number (3236922).

Almost surely, 2^12928543 is an apocalyptic number.

12928543 is a deficient number, since it is larger than the sum of its proper divisors (19145).

12928543 is an equidigital number, since it uses as much as digits as its factorization.

12928543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19144.

The product of its digits is 17280, while the sum is 34.

The square root of 12928543 is about 3595.6283178326. The cubic root of 12928543 is about 234.7018582169.

The spelling of 12928543 in words is "twelve million, nine hundred twenty-eight thousand, five hundred forty-three".