6540043 has 4 divisors (see below), whose sum is σ = 6564448. Its totient is φ = 6515640.

The previous prime is 6540029. The next prime is 6540067. The reversal of 6540043 is 3400456.

6540043 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6540043 - 2⁹ = 6539531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6539996 and 6540023.

It is not an unprimeable number, because it can be changed into a prime (6540013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11796 + ... + 12337.

It is an arithmetic number, because the mean of its divisors is an integer number (1641112).

Almost surely, 2^6540043 is an apocalyptic number.

6540043 is a deficient number, since it is larger than the sum of its proper divisors (24405).

6540043 is a wasteful number, since it uses less digits than its factorization.

6540043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24404.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6540043 is about 2557.3507776604. The cubic root of 6540043 is about 187.0080067492.

Adding to 6540043 its reverse (3400456), we get a palindrome (9940499).

The spelling of 6540043 in words is "six million, five hundred forty thousand, forty-three".