1323111541 has 4 divisors (see below), whose sum is σ = 1323892000. Its totient is φ = 1322331084.

The previous prime is 1323111499. The next prime is 1323111551. The reversal of 1323111541 is 1451113231.

It is a happy number.

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: 1451113231 = 229 ⋅6336739.

It is a cyclic number.

It is not a de Polignac number, because 1323111541 - 2²⁵ = 1289557109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323111551) 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, 387681 + ... + 391078.

It is an arithmetic number, because the mean of its divisors is an integer number (330973000).

Almost surely, 2^1323111541 is an apocalyptic number.

It is an amenable number.

1323111541 is a deficient number, since it is larger than the sum of its proper divisors (780459).

1323111541 is an equidigital number, since it uses as much as digits as its factorization.

1323111541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780458.

The product of its digits is 360, while the sum is 22.

The square root of 1323111541 is about 36374.6002177344. The cubic root of 1323111541 is about 1097.8225634338.

Adding to 1323111541 its reverse (1451113231), we get a palindrome (2774224772).

The spelling of 1323111541 in words is "one billion, three hundred twenty-three million, one hundred eleven thousand, five hundred forty-one".