1118143 has 4 divisors (see below), whose sum is σ = 1204168. Its totient is φ = 1032120.

The previous prime is 1118137. The next prime is 1118147. The reversal of 1118143 is 3418111.

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 1118143 - 2¹³ = 1109951 is a prime.

It is an Ulam number.

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 1118143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118147) 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, 42993 + ... + 43018.

It is an arithmetic number, because the mean of its divisors is an integer number (301042).

2^1118143 is an apocalyptic number.

1118143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1118143 is a deficient number, since it is larger than the sum of its proper divisors (86025).

1118143 is an equidigital number, since it uses as much as digits as its factorization.

1118143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86024.

The product of its digits is 96, while the sum is 19.

The square root of 1118143 is about 1057.4228104216. The cubic root of 1118143 is about 103.7924546820.

Subtracting 1118143 from its reverse (3418111), we obtain a cube (2299968 = 132³).

The spelling of 1118143 in words is "one million, one hundred eighteen thousand, one hundred forty-three".