6540243 has 8 divisors (see below), whose sum is σ = 8784528. Its totient is φ = 4328064.

The previous prime is 6540241. The next prime is 6540251. The reversal of 6540243 is 3420456.

6540243 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6540243 - 2¹ = 6540241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6540241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7546 + ... + 8367.

It is an arithmetic number, because the mean of its divisors is an integer number (1098066).

Almost surely, 2^6540243 is an apocalyptic number.

6540243 is a deficient number, since it is larger than the sum of its proper divisors (2244285).

6540243 is a wasteful number, since it uses less digits than its factorization.

6540243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16053.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6540243 is about 2557.3898803272. The cubic root of 6540243 is about 187.0099130170.

Adding to 6540243 its reverse (3420456), we get a palindrome (9960699).

The spelling of 6540243 in words is "six million, five hundred forty thousand, two hundred forty-three".