6571 has 2 divisors, whose sum is σ = 6572. Its totient is φ = 6570.

The previous prime is 6569. The next prime is 6577. The reversal of 6571 is 1756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6571 - 2¹ = 6569 is a prime.

Together with 6569, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (6577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3285 + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (3286).

2⁶⁵⁷¹ is an apocalyptic number.

6571 is a deficient number, since it is larger than the sum of its proper divisors (1).

6571 is an equidigital number, since it uses as much as digits as its factorization.

6571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210, while the sum is 19.

The square root of 6571 is about 81.0617048920. The cubic root of 6571 is about 18.7302607080.

It can be divided in two parts, 65 and 71, that added together give a triangular number (136 = T₁₆).

The spelling of 6571 in words is "six thousand, five hundred seventy-one".