12668545 has 4 divisors (see below), whose sum is σ = 15202260. Its totient is φ = 10134832.

The previous prime is 12668533. The next prime is 12668567. The reversal of 12668545 is 54586621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54586621 = 41 ⋅1331381.

It can be written as a sum of positive squares in 2 ways, for example, as 5089536 + 7579009 = 2256^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 12668545 - 2¹³ = 12660353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266850 + ... + 1266859.

It is an arithmetic number, because the mean of its divisors is an integer number (3800565).

Almost surely, 2^12668545 is an apocalyptic number.

It is an amenable number.

12668545 is a deficient number, since it is larger than the sum of its proper divisors (2533715).

12668545 is an equidigital number, since it uses as much as digits as its factorization.

12668545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533714.

The product of its digits is 57600, while the sum is 37.

The square root of 12668545 is about 3559.2899572808. The cubic root of 12668545 is about 233.1178770761.

The spelling of 12668545 in words is "twelve million, six hundred sixty-eight thousand, five hundred forty-five".