1318143 has 4 divisors (see below), whose sum is σ = 1757528. Its totient is φ = 878760.

The previous prime is 1318139. The next prime is 1318147. The reversal of 1318143 is 3418131.

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

It is an interprime number because it is at equal distance from previous prime (1318139) and next prime (1318147).

It is not a de Polignac number, because 1318143 - 2² = 1318139 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 219688 + ... + 219693.

It is an arithmetic number, because the mean of its divisors is an integer number (439382).

2^1318143 is an apocalyptic number.

1318143 is a deficient number, since it is larger than the sum of its proper divisors (439385).

1318143 is an equidigital number, since it uses as much as digits as its factorization.

1318143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439384.

The product of its digits is 288, while the sum is 21.

The square root of 1318143 is about 1148.1040893578. The cubic root of 1318143 is about 109.6446660699.

The spelling of 1318143 in words is "one million, three hundred eighteen thousand, one hundred forty-three".