6561171 has 6 divisors (see below), whose sum is σ = 9477260. Its totient is φ = 4374108.

The previous prime is 6561161. The next prime is 6561193. The reversal of 6561171 is 1711656.

6561171 is a `hidden beast` number, since 656 + 1 + 1 + 7 + 1 = 666.

It is not a de Polignac number, because 6561171 - 2¹³ = 6552979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6561151) 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 5 ways as a sum of consecutive naturals, for example, 364501 + ... + 364518.

Almost surely, 2^6561171 is an apocalyptic number.

6561171 is a deficient number, since it is larger than the sum of its proper divisors (2916089).

6561171 is a wasteful number, since it uses less digits than its factorization.

6561171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729025 (or 729022 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 6561171 is about 2561.4782841164. The cubic root of 6561171 is about 187.2091704635.

The spelling of 6561171 in words is "six million, five hundred sixty-one thousand, one hundred seventy-one".