12543166 has 4 divisors (see below), whose sum is σ = 18814752. Its totient is φ = 6271582.

The previous prime is 12543151. The next prime is 12543191. The reversal of 12543166 is 66134521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66134521 = 1801 ⋅36721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135790 + ... + 3135793.

It is an arithmetic number, because the mean of its divisors is an integer number (4703688).

Almost surely, 2^12543166 is an apocalyptic number.

12543166 is a deficient number, since it is larger than the sum of its proper divisors (6271586).

12543166 is an equidigital number, since it uses as much as digits as its factorization.

12543166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271585.

The product of its digits is 4320, while the sum is 28.

The square root of 12543166 is about 3541.6332390579. The cubic root of 12543166 is about 232.3462798584.

Adding to 12543166 its reverse (66134521), we get a palindrome (78677687).

The spelling of 12543166 in words is "twelve million, five hundred forty-three thousand, one hundred sixty-six".