42743 has 2 divisors, whose sum is σ = 42744. Its totient is φ = 42742.
The previous prime is 42737. The next prime is 42751. The reversal of 42743 is 34724.
It is a happy number.
42743 is nontrivially palindromic in base 14.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 42743 - 24 = 42727 is a prime.
It is a Sophie Germain prime.
It is a plaindrome in base 8.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (42703) 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, 21371 + 21372.
It is an arithmetic number, because the mean of its divisors is an integer number (21372).
242743 is an apocalyptic number.
42743 is a deficient number, since it is larger than the sum of its proper divisors (1).
42743 is an equidigital number, since it uses as much as digits as its factorization.
42743 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 672, while the sum is 20.
The square root of 42743 is about 206.7438028092. The cubic root of 42743 is about 34.9640447086.
The spelling of 42743 in words is "forty-two thousand, seven hundred forty-three", and thus it is an iban number.
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