1223143241 has 4 divisors (see below), whose sum is σ = 1225158912. Its totient is φ = 1221127572.

The previous prime is 1223143193. The next prime is 1223143247. The reversal of 1223143241 is 1423413221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1423413221 = 2659 ⋅535319.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223143241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1223143247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006925 + ... + 1008138.

It is an arithmetic number, because the mean of its divisors is an integer number (306289728).

Almost surely, 2^1223143241 is an apocalyptic number.

It is an amenable number.

1223143241 is a deficient number, since it is larger than the sum of its proper divisors (2015671).

1223143241 is an equidigital number, since it uses as much as digits as its factorization.

1223143241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015670.

The product of its digits is 1152, while the sum is 23.

The square root of 1223143241 is about 34973.4648126262. The cubic root of 1223143241 is about 1069.4466061443.

Adding to 1223143241 its reverse (1423413221), we get a palindrome (2646556462).

The spelling of 1223143241 in words is "one billion, two hundred twenty-three million, one hundred forty-three thousand, two hundred forty-one".