12666243 has 8 divisors (see below), whose sum is σ = 17470800. Its totient is φ = 8152928.

The previous prime is 12666239. The next prime is 12666263. The reversal of 12666243 is 34266621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12666243 - 2² = 12666239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12666243.

It is not an unprimeable number, because it can be changed into a prime (12666263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72708 + ... + 72881.

It is an arithmetic number, because the mean of its divisors is an integer number (2183850).

Almost surely, 2^12666243 is an apocalyptic number.

12666243 is a deficient number, since it is larger than the sum of its proper divisors (4804557).

12666243 is a wasteful number, since it uses less digits than its factorization.

12666243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145621.

The product of its digits is 10368, while the sum is 30.

The square root of 12666243 is about 3558.9665634844. The cubic root of 12666243 is about 233.1037562790.

The spelling of 12666243 in words is "twelve million, six hundred sixty-six thousand, two hundred forty-three".