1312243441 has 4 divisors (see below), whose sum is σ = 1331829232. Its totient is φ = 1292657652.

The previous prime is 1312243421. The next prime is 1312243463. The reversal of 1312243441 is 1443422131.

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.

It is a cyclic number.

It is not a de Polignac number, because 1312243441 - 2⁹ = 1312242929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312243411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9792795 + ... + 9792928.

It is an arithmetic number, because the mean of its divisors is an integer number (332957308).

Almost surely, 2^1312243441 is an apocalyptic number.

It is an amenable number.

1312243441 is a deficient number, since it is larger than the sum of its proper divisors (19585791).

1312243441 is an equidigital number, since it uses as much as digits as its factorization.

1312243441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19585790.

The product of its digits is 2304, while the sum is 25.

The square root of 1312243441 is about 36224.9008418243. The cubic root of 1312243441 is about 1094.8084403199.

Adding to 1312243441 its reverse (1443422131), we get a palindrome (2755665572).

The spelling of 1312243441 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, four hundred forty-one".