12405223 has 4 divisors (see below), whose sum is σ = 13134960. Its totient is φ = 11675488.

The previous prime is 12405221. The next prime is 12405269. The reversal of 12405223 is 32250421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12405223 - 2¹ = 12405221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12405223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405221) 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, 364843 + ... + 364876.

It is an arithmetic number, because the mean of its divisors is an integer number (3283740).

Almost surely, 2^12405223 is an apocalyptic number.

12405223 is a deficient number, since it is larger than the sum of its proper divisors (729737).

12405223 is an equidigital number, since it uses as much as digits as its factorization.

12405223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729736.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 12405223 is about 3522.1049104193. The cubic root of 12405223 is about 231.4913984679.

Adding to 12405223 its reverse (32250421), we get a palindrome (44655644).

The spelling of 12405223 in words is "twelve million, four hundred five thousand, two hundred twenty-three".