12681547 has 4 divisors (see below), whose sum is σ = 12694480. Its totient is φ = 12668616.

The previous prime is 12681527. The next prime is 12681577. The reversal of 12681547 is 74518621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74518621 = 7699 ⋅9679.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12681547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12681527) 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, 4863 + ... + 7000.

It is an arithmetic number, because the mean of its divisors is an integer number (3173620).

Almost surely, 2^12681547 is an apocalyptic number.

12681547 is a deficient number, since it is larger than the sum of its proper divisors (12933).

12681547 is a wasteful number, since it uses less digits than its factorization.

12681547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932.

The product of its digits is 13440, while the sum is 34.

The square root of 12681547 is about 3561.1159767691. The cubic root of 12681547 is about 233.1976011039.

The spelling of 12681547 in words is "twelve million, six hundred eighty-one thousand, five hundred forty-seven".