12671345 has 4 divisors (see below), whose sum is σ = 15205620. Its totient is φ = 10137072.

The previous prime is 12671339. The next prime is 12671377. The reversal of 12671345 is 54317621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54317621 = 73 ⋅744077.

It can be written as a sum of positive squares in 2 ways, for example, as 7491169 + 5180176 = 2737^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 12671345 - 2⁸ = 12671089 is a prime.

It is an unprimeable number.

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, 1267130 + ... + 1267139.

It is an arithmetic number, because the mean of its divisors is an integer number (3801405).

Almost surely, 2^12671345 is an apocalyptic number.

It is an amenable number.

12671345 is a deficient number, since it is larger than the sum of its proper divisors (2534275).

12671345 is an equidigital number, since it uses as much as digits as its factorization.

12671345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534274.

The product of its digits is 5040, while the sum is 29.

The square root of 12671345 is about 3559.6832724275. The cubic root of 12671345 is about 233.1350503709.

Adding to 12671345 its reverse (54317621), we get a palindrome (66988966).

The spelling of 12671345 in words is "twelve million, six hundred seventy-one thousand, three hundred forty-five".