1161143 has 2 divisors, whose sum is σ = 1161144. Its totient is φ = 1161142.

The previous prime is 1161137. The next prime is 1161163. The reversal of 1161143 is 3411611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580571 + 580572.

It is an arithmetic number, because the mean of its divisors is an integer number (580572).

2^1161143 is an apocalyptic number.

1161143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161143 is an equidigital number, since it uses as much as digits as its factorization.

1161143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 1161143 is about 1077.5634552081. The cubic root of 1161143 is about 105.1062567587.

Adding to 1161143 its reverse (3411611), we get a palindrome (4572754).

The spelling of 1161143 in words is "one million, one hundred sixty-one thousand, one hundred forty-three".