6541543 has 4 divisors (see below), whose sum is σ = 6549880. Its totient is φ = 6533208.

The previous prime is 6541541. The next prime is 6541571. The reversal of 6541543 is 3451456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6541543 - 2¹ = 6541541 is a prime.

It is a Duffinian number.

6541543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6541541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2853 + ... + 4606.

It is an arithmetic number, because the mean of its divisors is an integer number (1637470).

Almost surely, 2^6541543 is an apocalyptic number.

6541543 is a deficient number, since it is larger than the sum of its proper divisors (8337).

6541543 is an equidigital number, since it uses as much as digits as its factorization.

6541543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336.

The product of its digits is 7200, while the sum is 28.

The square root of 6541543 is about 2557.6440330898. The cubic root of 6541543 is about 187.0223028105.

Adding to 6541543 its reverse (3451456), we get a palindrome (9992999).

It can be divided in two parts, 654 and 1543, that added together give a cube (2197 = 13³).

The spelling of 6541543 in words is "six million, five hundred forty-one thousand, five hundred forty-three".