1311342445 has 16 divisors (see below), whose sum is σ = 1860428160. Its totient is φ = 868198464.

The previous prime is 1311342443. The next prime is 1311342449. The reversal of 1311342445 is 5442431131.

It is not a de Polignac number, because 1311342445 - 2¹ = 1311342443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311342443) 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 15 ways as a sum of consecutive naturals, for example, 644967 + ... + 646996.

It is an arithmetic number, because the mean of its divisors is an integer number (116276760).

Almost surely, 2^1311342445 is an apocalyptic number.

It is an amenable number.

1311342445 is a deficient number, since it is larger than the sum of its proper divisors (549085715).

1311342445 is a wasteful number, since it uses less digits than its factorization.

1311342445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292004.

The product of its digits is 5760, while the sum is 28.

The square root of 1311342445 is about 36212.4625647028. The cubic root of 1311342445 is about 1094.5578151077.

Adding to 1311342445 its reverse (5442431131), we get a palindrome (6753773576).

The spelling of 1311342445 in words is "one billion, three hundred eleven million, three hundred forty-two thousand, four hundred forty-five".