1311104143 has 4 divisors (see below), whose sum is σ = 1311721528. Its totient is φ = 1310486760.

The previous prime is 1311104051. The next prime is 1311104149. The reversal of 1311104143 is 3414011131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311104143 - 2²⁹ = 774233231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311104143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311104149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305496 + ... + 309757.

It is an arithmetic number, because the mean of its divisors is an integer number (327930382).

Almost surely, 2^1311104143 is an apocalyptic number.

1311104143 is a deficient number, since it is larger than the sum of its proper divisors (617385).

1311104143 is an equidigital number, since it uses as much as digits as its factorization.

1311104143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617384.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1311104143 is about 36209.1720838795. The cubic root of 1311104143 is about 1094.4915087261.

Adding to 1311104143 its reverse (3414011131), we get a palindrome (4725115274).

The spelling of 1311104143 in words is "one billion, three hundred eleven million, one hundred four thousand, one hundred forty-three".