12228169 has 4 divisors (see below), whose sum is σ = 12649860. Its totient is φ = 11806480.

The previous prime is 12228143. The next prime is 12228187. The reversal of 12228169 is 96182221.

12228169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5405625 + 6822544 = 2325^2 + 2612^2 .

It is not a de Polignac number, because 12228169 - 2⁵ = 12228137 is a prime.

It is a super-2 number, since 2×12228169² = 299056234185122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 12228169.

It is not an unprimeable number, because it can be changed into a prime (12228119) 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, 210802 + ... + 210859.

It is an arithmetic number, because the mean of its divisors is an integer number (3162465).

Almost surely, 2^12228169 is an apocalyptic number.

It is an amenable number.

12228169 is a deficient number, since it is larger than the sum of its proper divisors (421691).

12228169 is an equidigital number, since it uses as much as digits as its factorization.

12228169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421690.

The product of its digits is 3456, while the sum is 31.

The square root of 12228169 is about 3496.8798949921. The cubic root of 12228169 is about 230.3847938078.

The spelling of 12228169 in words is "twelve million, two hundred twenty-eight thousand, one hundred sixty-nine".