12456224 has 36 divisors (see below), whose sum is σ = 26963622. Its totient is φ = 5660160.

The previous prime is 12456221. The next prime is 12456253. The reversal of 12456224 is 42265421.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 4276624 = 2860^2 + 2068^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12456193 and 12456202.

It is not an unprimeable number, because it can be changed into a prime (12456221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2264 + ... + 5480.

Almost surely, 2^12456224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12456224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13481811).

12456224 is an abundant number, since it is smaller than the sum of its proper divisors (14507398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12456224 is a wasteful number, since it uses less digits than its factorization.

12456224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249 (or 3230 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 12456224 is about 3529.3376149074. The cubic root of 12456224 is about 231.8082045454.

The spelling of 12456224 in words is "twelve million, four hundred fifty-six thousand, two hundred twenty-four".