1231228 has 12 divisors (see below), whose sum is σ = 2163672. Its totient is φ = 613040.

The previous prime is 1231207. The next prime is 1231229. The reversal of 1231228 is 8221321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231229) by changing a digit.

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, 783 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (180306).

2^1231228 is an apocalyptic number.

It is an amenable number.

1231228 is a deficient number, since it is larger than the sum of its proper divisors (932444).

1231228 is a wasteful number, since it uses less digits than its factorization.

1231228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1290 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1231228 is about 1109.6071376843. The cubic root of 1231228 is about 107.1797717457.

Adding to 1231228 its reverse (8221321), we get a palindrome (9452549).

The spelling of 1231228 in words is "one million, two hundred thirty-one thousand, two hundred twenty-eight".