12401228 has 24 divisors (see below), whose sum is σ = 26262432. Its totient is φ = 5001984.

The previous prime is 12401189. The next prime is 12401251. The reversal of 12401228 is 82210421.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 12551 + ... + 13502.

It is an arithmetic number, because the mean of its divisors is an integer number (1094268).

Almost surely, 2^12401228 is an apocalyptic number.

It is an amenable number.

12401228 is an abundant number, since it is smaller than the sum of its proper divisors (13861204).

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

12401228 is a wasteful number, since it uses less digits than its factorization.

12401228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26081 (or 26079 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 12401228 is about 3521.5377322982. The cubic root of 12401228 is about 231.4665458331.

Adding to 12401228 its reverse (82210421), we get a palindrome (94611649).

The spelling of 12401228 in words is "twelve million, four hundred one thousand, two hundred twenty-eight".