971143 has 2 divisors, whose sum is σ = 971144. Its totient is φ = 971142.

The previous prime is 971141. The next prime is 971149. The reversal of 971143 is 341179.

It is a weak prime.

It is an emirp because it is prime and its reverse (341179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971143 - 2¹ = 971141 is a prime.

Together with 971141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971141) 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 as a sum of consecutive naturals, namely, 485571 + 485572.

It is an arithmetic number, because the mean of its divisors is an integer number (485572).

2⁹⁷¹¹⁴³ is an apocalyptic number.

971143 is a deficient number, since it is larger than the sum of its proper divisors (1).

971143 is an equidigital number, since it uses as much as digits as its factorization.

971143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 971143 is about 985.4658796732. The cubic root of 971143 is about 99.0286962352.

The spelling of 971143 in words is "nine hundred seventy-one thousand, one hundred forty-three".