1115143 has 4 divisors (see below), whose sum is σ = 1145320. Its totient is φ = 1084968.

The previous prime is 1115131. The next prime is 1115189. The reversal of 1115143 is 3415111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3415111 = 7 ⋅487873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115143 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 (1115113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15033 + ... + 15106.

It is an arithmetic number, because the mean of its divisors is an integer number (286330).

2^1115143 is an apocalyptic number.

1115143 is a deficient number, since it is larger than the sum of its proper divisors (30177).

1115143 is an equidigital number, since it uses as much as digits as its factorization.

1115143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30176.

The product of its digits is 60, while the sum is 16.

The square root of 1115143 is about 1056.0033143887. The cubic root of 1115143 is about 103.6995457973.

Subtracting 1115143 from its reverse (3415111), we obtain a cube (2299968 = 132³).

The spelling of 1115143 in words is "one million, one hundred fifteen thousand, one hundred forty-three".