12878543 has 4 divisors (see below), whose sum is σ = 13178088. Its totient is φ = 12579000.

The previous prime is 12878531. The next prime is 12878563. The reversal of 12878543 is 34587821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12878543 - 2⁸ = 12878287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12878497 and 12878506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149708 + ... + 149793.

It is an arithmetic number, because the mean of its divisors is an integer number (3294522).

Almost surely, 2^12878543 is an apocalyptic number.

12878543 is a deficient number, since it is larger than the sum of its proper divisors (299545).

12878543 is an equidigital number, since it uses as much as digits as its factorization.

12878543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299544.

The product of its digits is 53760, while the sum is 38.

The square root of 12878543 is about 3588.6686946554. The cubic root of 12878543 is about 234.3989044181.

The spelling of 12878543 in words is "twelve million, eight hundred seventy-eight thousand, five hundred forty-three".