12751228 has 12 divisors (see below), whose sum is σ = 25502512. Its totient is φ = 5464800.

The previous prime is 12751201. The next prime is 12751231. The reversal of 12751228 is 82215721.

12751228 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 455401 = 12751228 / (1 + 2 + 7 + 5 + 1 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 12751196 and 12751205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227673 + ... + 227728.

Almost surely, 2^12751228 is an apocalyptic number.

It is an amenable number.

12751228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12751228 is a wasteful number, since it uses less digits than its factorization.

12751228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455412 (or 455410 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 12751228 is about 3570.8861645256. The cubic root of 12751228 is about 233.6239363334.

Adding to 12751228 its reverse (82215721), we get a palindrome (94966949).

The spelling of 12751228 in words is "twelve million, seven hundred fifty-one thousand, two hundred twenty-eight".