1223559 has 8 divisors (see below), whose sum is σ = 1812720. Its totient is φ = 815688.

The previous prime is 1223549. The next prime is 1223561. The reversal of 1223559 is 9553221.

It is not a de Polignac number, because 1223559 - 2⁵ = 1223527 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: 45317 = 1223559 / (1 + 2 + 2 + 3 + 5 + 5 + 9).

It is a plaindrome in base 10 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223549) 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, 22632 + ... + 22685.

It is an arithmetic number, because the mean of its divisors is an integer number (226590).

2^1223559 is an apocalyptic number.

1223559 is a deficient number, since it is larger than the sum of its proper divisors (589161).

1223559 is an equidigital number, since it uses as much as digits as its factorization.

1223559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45326 (or 45320 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1223559 is about 1106.1460120617. The cubic root of 1223559 is about 106.9567764394.

The spelling of 1223559 in words is "one million, two hundred twenty-three thousand, five hundred fifty-nine".