1321423441 has 8 divisors (see below), whose sum is σ = 1441086080. Its totient is φ = 1204334352.

The previous prime is 1321423429. The next prime is 1321423487. The reversal of 1321423441 is 1443241231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321423441 - 2¹¹ = 1321421393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321483441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642315 + ... + 644368.

It is an arithmetic number, because the mean of its divisors is an integer number (180135760).

Almost surely, 2^1321423441 is an apocalyptic number.

It is an amenable number.

1321423441 is a deficient number, since it is larger than the sum of its proper divisors (119662639).

1321423441 is a wasteful number, since it uses less digits than its factorization.

1321423441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286775.

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

The square root of 1321423441 is about 36351.3884329058. The cubic root of 1321423441 is about 1097.3554768417.

Adding to 1321423441 its reverse (1443241231), we get a palindrome (2764664672).

The spelling of 1321423441 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, four hundred forty-one".