81043 has 2 divisors, whose sum is σ = 81044. Its totient is φ = 81042.

The previous prime is 81041. The next prime is 81047. The reversal of 81043 is 34018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81043 - 2¹ = 81041 is a prime.

Together with 81041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40521 + 40522.

It is an arithmetic number, because the mean of its divisors is an integer number (40522).

2⁸¹⁰⁴³ is an apocalyptic number.

81043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81043 is an equidigital number, since it uses as much as digits as its factorization.

81043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 81043 is about 284.6805226917. The cubic root of 81043 is about 43.2751421414.

The spelling of 81043 in words is "eighty-one thousand, forty-three".