1311348243 has 16 divisors (see below), whose sum is σ = 1830343680. Its totient is φ = 833536704.

The previous prime is 1311348229. The next prime is 1311348281. The reversal of 1311348243 is 3428431131.

It is a happy number.

It is not a de Polignac number, because 1311348243 - 2¹⁴ = 1311331859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311348243.

It is not an unprimeable number, because it can be changed into a prime (1311348443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8763 + ... + 51956.

It is an arithmetic number, because the mean of its divisors is an integer number (114396480).

Almost surely, 2^1311348243 is an apocalyptic number.

1311348243 is a deficient number, since it is larger than the sum of its proper divisors (518995437).

1311348243 is a wasteful number, since it uses less digits than its factorization.

1311348243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61058.

The product of its digits is 6912, while the sum is 30.

The square root of 1311348243 is about 36212.5426199266. The cubic root of 1311348243 is about 1094.5594282732.

Adding to 1311348243 its reverse (3428431131), we get a palindrome (4739779374).

The spelling of 1311348243 in words is "one billion, three hundred eleven million, three hundred forty-eight thousand, two hundred forty-three".