12660243 has 4 divisors (see below), whose sum is σ = 16880328. Its totient is φ = 8440160.

The previous prime is 12660229. The next prime is 12660283. The reversal of 12660243 is 34206621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34206621 = 3 ⋅11402207.

It is a cyclic number.

It is not a de Polignac number, because 12660243 - 2⁴ = 12660227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12660203) 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, 2110038 + ... + 2110043.

It is an arithmetic number, because the mean of its divisors is an integer number (4220082).

Almost surely, 2^12660243 is an apocalyptic number.

12660243 is a deficient number, since it is larger than the sum of its proper divisors (4220085).

12660243 is an equidigital number, since it uses as much as digits as its factorization.

12660243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220084.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 12660243 is about 3558.1235223078. The cubic root of 12660243 is about 233.0669433783.

Adding to 12660243 its reverse (34206621), we get a palindrome (46866864).

The spelling of 12660243 in words is "twelve million, six hundred sixty thousand, two hundred forty-three".