6541855 has 8 divisors (see below), whose sum is σ = 8312112. Its totient is φ = 4925568.

The previous prime is 6541841. The next prime is 6541877. The reversal of 6541855 is 5581456.

It is a happy number.

6541855 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 a cyclic number.

It is not a de Polignac number, because 6541855 - 2⁹ = 6541343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6541855.

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, 38397 + ... + 38566.

It is an arithmetic number, because the mean of its divisors is an integer number (1039014).

Almost surely, 2^6541855 is an apocalyptic number.

6541855 is a deficient number, since it is larger than the sum of its proper divisors (1770257).

6541855 is a wasteful number, since it uses less digits than its factorization.

6541855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76985.

The product of its digits is 24000, while the sum is 34.

The square root of 6541855 is about 2557.7050259950. The cubic root of 6541855 is about 187.0252761167.

Subtracting from 6541855 its product of digits (24000), we obtain a triangular number (6517855 = T₃₆₁₀).

It can be divided in two parts, 6541 and 855, that added together give a square (7396 = 86²).

The spelling of 6541855 in words is "six million, five hundred forty-one thousand, eight hundred fifty-five".