1311431242 has 8 divisors (see below), whose sum is σ = 2145978432. Its totient is φ = 596105100.

The previous prime is 1311431239. The next prime is 1311431263. The reversal of 1311431242 is 2421341131.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 59610511 = 1311431242 / (1 + 3 + 1 + 1 + 4 + 3 + 1 + 2 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29805234 + ... + 29805277.

It is an arithmetic number, because the mean of its divisors is an integer number (268247304).

Almost surely, 2^1311431242 is an apocalyptic number.

1311431242 is a deficient number, since it is larger than the sum of its proper divisors (834547190).

1311431242 is a wasteful number, since it uses less digits than its factorization.

1311431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59610524.

The product of its digits is 576, while the sum is 22.

The square root of 1311431242 is about 36213.6885997547. The cubic root of 1311431242 is about 1094.5825203902.

Adding to 1311431242 its reverse (2421341131), we get a palindrome (3732772373).

The spelling of 1311431242 in words is "one billion, three hundred eleven million, four hundred thirty-one thousand, two hundred forty-two".