6542 has 4 divisors (see below), whose sum is σ = 9816.
Its totient is φ = 3270.
The previous prime is 6529. The next prime is 6547. The reversal of 6542 is 2456.
It is a semiprime because it is the product of two primes.
It is a nialpdrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 6542.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (6547) by changing a digit.
6542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1634 + ... + 1637.
It is an arithmetic number, because the mean of its divisors is an integer number (2454).
26542 is an apocalyptic number.
6542 is a deficient number, since it is larger than the sum of its proper divisors (3274).
6542 is a wasteful number, since it uses less digits than its factorization.
6542 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3273.
The product of its digits is 240, while the sum is 17.
The square root of 6542 is about 80.8826310156.
The cubic root of 6542 is about 18.7026657909.
Adding to 6542 its reverse (2456), we get a palindrome (8998).
It can be divided in two parts, 654 and 2, that added together give a palindrome (656).
The spelling of 6542 in words is "six thousand, five hundred forty-two".