1143191 has 8 divisors (see below), whose sum is σ = 1314720. Its totient is φ = 973728.

The previous prime is 1143167. The next prime is 1143193. The reversal of 1143191 is 1913411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1143191 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 (1143193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (164340).

2^1143191 is an apocalyptic number.

1143191 is a deficient number, since it is larger than the sum of its proper divisors (171529).

1143191 is an equidigital number, since it uses as much as digits as its factorization.

1143191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033.

The product of its digits is 108, while the sum is 20.

The square root of 1143191 is about 1069.2011036283. The cubic root of 1143191 is about 104.5617714350.

The spelling of 1143191 in words is "one million, one hundred forty-three thousand, one hundred ninety-one".