6541605 has 48 divisors (see below), whose sum is σ = 13653120. Its totient is φ = 2830464.

The previous prime is 6541597. The next prime is 6541609. The reversal of 6541605 is 5061456.

It is a happy number.

6541605 is a `hidden beast` number, since 6 + 54 + 1 + 605 = 666.

It is not a de Polignac number, because 6541605 - 2³ = 6541597 is a prime.

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 (6541609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5439 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (284440).

Almost surely, 2^6541605 is an apocalyptic number.

It is an amenable number.

6541605 is an abundant number, since it is smaller than the sum of its proper divisors (7111515).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6541605 is a wasteful number, since it uses less digits than its factorization.

6541605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 6541605 is about 2557.6561535906. The cubic root of 6541605 is about 187.0228936673.

The spelling of 6541605 in words is "six million, five hundred forty-one thousand, six hundred five".