1311052143 has 8 divisors (see below), whose sum is σ = 1748810800. Its totient is φ = 873664128.

The previous prime is 1311052129. The next prime is 1311052153. The reversal of 1311052143 is 3412501131.

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

It is not a de Polignac number, because 1311052143 - 2⁹ = 1311051631 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 (1311052123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84298 + ... + 98631.

It is an arithmetic number, because the mean of its divisors is an integer number (218601350).

Almost surely, 2^1311052143 is an apocalyptic number.

1311052143 is a deficient number, since it is larger than the sum of its proper divisors (437758657).

1311052143 is a wasteful number, since it uses less digits than its factorization.

1311052143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185321.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1311052143 is about 36208.4540266496. The cubic root of 1311052143 is about 1094.4770389091.

Adding to 1311052143 its reverse (3412501131), we get a palindrome (4723553274).

The spelling of 1311052143 in words is "one billion, three hundred eleven million, fifty-two thousand, one hundred forty-three".