12661223 has 8 divisors (see below), whose sum is σ = 13122000. Its totient is φ = 12208768.

The previous prime is 12661213. The next prime is 12661241. The reversal of 12661223 is 32216621.

12661223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12661223 - 2²² = 8466919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661213) 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, 1103 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (1640250).

Almost surely, 2^12661223 is an apocalyptic number.

12661223 is a deficient number, since it is larger than the sum of its proper divisors (460777).

12661223 is an equidigital number, since it uses as much as digits as its factorization.

12661223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161.

The product of its digits is 864, while the sum is 23.

The square root of 12661223 is about 3558.2612326809. The cubic root of 12661223 is about 233.0729569467.

Adding to 12661223 its reverse (32216621), we get a palindrome (44877844).

The spelling of 12661223 in words is "twelve million, six hundred sixty-one thousand, two hundred twenty-three".