1321441441 has 4 divisors (see below), whose sum is σ = 1329354432. Its totient is φ = 1313528452.

The previous prime is 1321441403. The next prime is 1321441481. The reversal of 1321441441 is 1441441231.

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 a de Polignac number, because none of the positive numbers 2^k-1321441441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321441481) 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, 3956245 + ... + 3956578.

It is an arithmetic number, because the mean of its divisors is an integer number (332338608).

Almost surely, 2^1321441441 is an apocalyptic number.

It is an amenable number.

1321441441 is a deficient number, since it is larger than the sum of its proper divisors (7912991).

1321441441 is an equidigital number, since it uses as much as digits as its factorization.

1321441441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912990.

The product of its digits is 1536, while the sum is 25.

The square root of 1321441441 is about 36351.6360154533. The cubic root of 1321441441 is about 1097.3604594255.

Adding to 1321441441 its reverse (1441441231), we get a palindrome (2762882672).

The spelling of 1321441441 in words is "one billion, three hundred twenty-one million, four hundred forty-one thousand, four hundred forty-one".