1223504005 has 4 divisors (see below), whose sum is σ = 1468204812. Its totient is φ = 978803200.

The previous prime is 1223503979. The next prime is 1223504011. The reversal of 1223504005 is 5004053221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 235407649 + 988096356 = 15343^2 + 31434^2 .

It is not a de Polignac number, because 1223504005 - 2²³ = 1215115397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122350396 + ... + 122350405.

It is an arithmetic number, because the mean of its divisors is an integer number (367051203).

Almost surely, 2^1223504005 is an apocalyptic number.

It is an amenable number.

1223504005 is a deficient number, since it is larger than the sum of its proper divisors (244700807).

1223504005 is an equidigital number, since it uses as much as digits as its factorization.

1223504005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244700806.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1223504005 is about 34978.6221140856. The cubic root of 1223504005 is about 1069.5517396224.

Adding to 1223504005 its reverse (5004053221), we get a palindrome (6227557226).

The spelling of 1223504005 in words is "one billion, two hundred twenty-three million, five hundred four thousand, five".