12261224 has 16 divisors (see below), whose sum is σ = 23040420. Its totient is φ = 6117120.

The previous prime is 12261211. The next prime is 12261253. The reversal of 12261224 is 42216221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12124324 + 136900 = 3482^2 + 370^2 .

It is a super-2 number, since 2×12261224² = 300675227956352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12261196 and 12261205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2912 + ... + 5744.

Almost surely, 2^12261224 is an apocalyptic number.

It is an amenable number.

12261224 is a deficient number, since it is larger than the sum of its proper divisors (10779196).

12261224 is a wasteful number, since it uses less digits than its factorization.

12261224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3376 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 12261224 is about 3501.6030614563. The cubic root of 12261224 is about 230.5921979233.

Adding to 12261224 its reverse (42216221), we get a palindrome (54477445).

The spelling of 12261224 in words is "twelve million, two hundred sixty-one thousand, two hundred twenty-four".