12668547 has 4 divisors (see below), whose sum is σ = 16891400. Its totient is φ = 8445696.

The previous prime is 12668533. The next prime is 12668567. The reversal of 12668547 is 74586621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74586621 = 3 ⋅24862207.

It is not a de Polignac number, because 12668547 - 2⁶ = 12668483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12668507) 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, 2111422 + ... + 2111427.

It is an arithmetic number, because the mean of its divisors is an integer number (4222850).

Almost surely, 2^12668547 is an apocalyptic number.

12668547 is a deficient number, since it is larger than the sum of its proper divisors (4222853).

12668547 is an equidigital number, since it uses as much as digits as its factorization.

12668547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222852.

The product of its digits is 80640, while the sum is 39.

The square root of 12668547 is about 3559.2902382357. The cubic root of 12668547 is about 233.1178893436.

The spelling of 12668547 in words is "twelve million, six hundred sixty-eight thousand, five hundred forty-seven".