6540445 has 8 divisors (see below), whose sum is σ = 7981920. Its totient is φ = 5143440.

The previous prime is 6540433. The next prime is 6540451. The reversal of 6540445 is 5440456.

6540445 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 6540445 - 2¹⁷ = 6409373 is a prime.

6540445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10791 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (997740).

Almost surely, 2^6540445 is an apocalyptic number.

It is an amenable number.

6540445 is a deficient number, since it is larger than the sum of its proper divisors (1441475).

6540445 is a wasteful number, since it uses less digits than its factorization.

6540445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22235.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 6540445 is about 2557.4293734139. The cubic root of 6540445 is about 187.0118383080.

The spelling of 6540445 in words is "six million, five hundred forty thousand, four hundred forty-five".