1312043305 has 16 divisors (see below), whose sum is σ = 1645357824. Its totient is φ = 1003403520.

The previous prime is 1312043279. The next prime is 1312043321. The reversal of 1312043305 is 5033402131.

It is not a de Polignac number, because 1312043305 - 2²⁷ = 1177825577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54816 + ... + 75025.

It is an arithmetic number, because the mean of its divisors is an integer number (102834864).

Almost surely, 2^1312043305 is an apocalyptic number.

It is an amenable number.

1312043305 is a deficient number, since it is larger than the sum of its proper divisors (333314519).

1312043305 is a wasteful number, since it uses less digits than its factorization.

1312043305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129936.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1312043305 is about 36222.1383272716. The cubic root of 1312043305 is about 1094.7527794785.

Adding to 1312043305 its reverse (5033402131), we get a palindrome (6345445436).

The spelling of 1312043305 in words is "one billion, three hundred twelve million, forty-three thousand, three hundred five".