1543 has 2 divisors, whose sum is σ = 1544.
Its totient is φ = 1542.
The previous prime is 1531. The next prime is 1549. The reversal of 1543 is 3451.
1543 is nontrivially palindromic in base 13.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 1543 - 25 = 1511 is a prime.
1543 is an undulating number in base 13.
1543 is a lucky number.
It is a plaindrome in base 15.
It is a nialpdrome in base 7 and base 12.
It is a zygodrome in base 2.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1549) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771 + 772.
It is an arithmetic number, because the mean of its divisors is an integer number (772).
1543 is a deficient number, since it is larger than the sum of its proper divisors (1).
1543 is an equidigital number, since it uses as much as digits as its factorization.
1543 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 60, while the sum is 13.
The square root of 1543 is about 39.2810386828.
The cubic root of 1543 is about 11.5554973425.
Note that the first 3 decimals are identical.
Adding to 1543 its reverse (3451), we get a palindrome (4994).
The spelling of 1543 in words is "one thousand, five hundred forty-three".