12551228 has 12 divisors (see below), whose sum is σ = 22032192. Its totient is φ = 6256320.

The previous prime is 12551213. The next prime is 12551239. The reversal of 12551228 is 82215521.

It is a junction number, because it is equal to n+sod(n) for n = 12551197 and 12551206.

It is a congruent number.

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, 3308 + ... + 6003.

It is an arithmetic number, because the mean of its divisors is an integer number (1836016).

Almost surely, 2^12551228 is an apocalyptic number.

It is an amenable number.

12551228 is a deficient number, since it is larger than the sum of its proper divisors (9480964).

12551228 is a wasteful number, since it uses less digits than its factorization.

12551228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652 (or 9650 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 12551228 is about 3542.7712316773. The cubic root of 12551228 is about 232.3960486470.

Adding to 12551228 its reverse (82215521), we get a palindrome (94766749).

The spelling of 12551228 in words is "twelve million, five hundred fifty-one thousand, two hundred twenty-eight".