1223289 has 8 divisors (see below), whose sum is σ = 1812320. Its totient is φ = 815508.

The previous prime is 1223281. The next prime is 1223309. The reversal of 1223289 is 9823221.

It is a happy number.

It is not a de Polignac number, because 1223289 - 2³ = 1223281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 45307 = 1223289 / (1 + 2 + 2 + 3 + 2 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223281) 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 7 ways as a sum of consecutive naturals, for example, 22627 + ... + 22680.

It is an arithmetic number, because the mean of its divisors is an integer number (226540).

2^1223289 is an apocalyptic number.

It is an amenable number.

1223289 is a deficient number, since it is larger than the sum of its proper divisors (589031).

1223289 is an equidigital number, since it uses as much as digits as its factorization.

1223289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45316 (or 45310 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1223289 is about 1106.0239599575. The cubic root of 1223289 is about 106.9489085572.

It can be divided in two parts, 12232 and 89, that added together give a palindrome (12321).

The spelling of 1223289 in words is "one million, two hundred twenty-three thousand, two hundred eighty-nine".