12222447 has 4 divisors (see below), whose sum is σ = 16296600. Its totient is φ = 8148296.

The previous prime is 12222433. The next prime is 12222461. The reversal of 12222447 is 74422221.

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

It is an interprime number because it is at equal distance from previous prime (12222433) and next prime (12222461).

It is a cyclic number.

It is not a de Polignac number, because 12222447 - 2⁷ = 12222319 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037072 + ... + 2037077.

It is an arithmetic number, because the mean of its divisors is an integer number (4074150).

Almost surely, 2^12222447 is an apocalyptic number.

12222447 is a deficient number, since it is larger than the sum of its proper divisors (4074153).

12222447 is an equidigital number, since it uses as much as digits as its factorization.

12222447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074152.

The product of its digits is 1792, while the sum is 24.

The square root of 12222447 is about 3496.0616413330. The cubic root of 12222447 is about 230.3488530913.

Adding to 12222447 its reverse (74422221), we get a palindrome (86644668).

The spelling of 12222447 in words is "twelve million, two hundred twenty-two thousand, four hundred forty-seven".