1143187 has 4 divisors (see below), whose sum is σ = 1180096. Its totient is φ = 1106280.

The previous prime is 1143167. The next prime is 1143193. The reversal of 1143187 is 7813411.

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 1143187 - 2¹¹ = 1141139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143167) 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, 18408 + ... + 18469.

It is an arithmetic number, because the mean of its divisors is an integer number (295024).

2^1143187 is an apocalyptic number.

1143187 is a deficient number, since it is larger than the sum of its proper divisors (36909).

1143187 is an equidigital number, since it uses as much as digits as its factorization.

1143187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36908.

The product of its digits is 672, while the sum is 25.

The square root of 1143187 is about 1069.1992330712. The cubic root of 1143187 is about 104.5616494817.

Adding to 1143187 its reverse (7813411), we get a palindrome (8956598).

The spelling of 1143187 in words is "one million, one hundred forty-three thousand, one hundred eighty-seven".