1223523 has 12 divisors (see below), whose sum is σ = 2019888. Its totient is φ = 699120.

The previous prime is 1223491. The next prime is 1223527. The reversal of 1223523 is 3253221.

It is not a de Polignac number, because 1223523 - 2⁵ = 1223491 is a prime.

1223523 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1223496 and 1223505.

It is not an unprimeable number, because it can be changed into a prime (1223527) 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 11 ways as a sum of consecutive naturals, for example, 9648 + ... + 9773.

It is an arithmetic number, because the mean of its divisors is an integer number (168324).

2^1223523 is an apocalyptic number.

1223523 is a deficient number, since it is larger than the sum of its proper divisors (796365).

1223523 is a wasteful number, since it uses less digits than its factorization.

1223523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19434 (or 19431 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 1223523 is about 1106.1297392259. The cubic root of 1223523 is about 106.9557274553.

Adding to 1223523 its reverse (3253221), we get a palindrome (4476744).

The spelling of 1223523 in words is "one million, two hundred twenty-three thousand, five hundred twenty-three".