1123555 has 4 divisors (see below), whose sum is σ = 1348272. Its totient is φ = 898840.

The previous prime is 1123553. The next prime is 1123561. The reversal of 1123555 is 5553211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1123555 - 2¹ = 1123553 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1123553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112351 + ... + 112360.

It is an arithmetic number, because the mean of its divisors is an integer number (337068).

2^1123555 is an apocalyptic number.

1123555 is a deficient number, since it is larger than the sum of its proper divisors (224717).

1123555 is an equidigital number, since it uses as much as digits as its factorization.

1123555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224716.

The product of its digits is 750, while the sum is 22.

The square root of 1123555 is about 1059.9787733724. The cubic root of 1123555 is about 103.9596428720.

Adding to 1123555 its reverse (5553211), we get a palindrome (6676766).

The spelling of 1123555 in words is "one million, one hundred twenty-three thousand, five hundred fifty-five".