6540009 has 32 divisors (see below), whose sum is σ = 10798080. Its totient is φ = 3436992.

The previous prime is 6540007. The next prime is 6540013. The reversal of 6540009 is 9000456.

6540009 is nontrivially palindromic in base 11.

6540009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6540009 - 2¹ = 6540007 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540007) 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 31 ways as a sum of consecutive naturals, for example, 14542 + ... + 14984.

It is an arithmetic number, because the mean of its divisors is an integer number (337440).

Almost surely, 2^6540009 is an apocalyptic number.

It is an amenable number.

6540009 is a deficient number, since it is larger than the sum of its proper divisors (4258071).

6540009 is a wasteful number, since it uses less digits than its factorization.

6540009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 6540009 is about 2557.3441301475. The cubic root of 6540009 is about 187.0076826798.

The spelling of 6540009 in words is "six million, five hundred forty thousand, nine".