12780224 has 28 divisors (see below), whose sum is σ = 25475184. Its totient is φ = 6361344.

The previous prime is 12780223. The next prime is 12780247. The reversal of 12780224 is 42208721.

It is a junction number, because it is equal to n+sod(n) for n = 12780193 and 12780202.

It is not an unprimeable number, because it can be changed into a prime (12780221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25157 + ... + 25659.

It is an arithmetic number, because the mean of its divisors is an integer number (909828).

Almost surely, 2^12780224 is an apocalyptic number.

It is an amenable number.

12780224 is a deficient number, since it is larger than the sum of its proper divisors (12694960).

12780224 is an equidigital number, since it uses as much as digits as its factorization.

12780224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 12780224 is about 3574.9439156440. The cubic root of 12780224 is about 233.8008874311.

Adding to 12780224 its reverse (42208721), we get a palindrome (54988945).

The spelling of 12780224 in words is "twelve million, seven hundred eighty thousand, two hundred twenty-four".