42571 has 2 divisors, whose sum is σ = 42572. Its totient is φ = 42570.

The previous prime is 42569. The next prime is 42577. The reversal of 42571 is 17524.

42571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42571 - 2¹ = 42569 is a prime.

Together with 42569, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (42577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21285 + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (21286).

2⁴²⁵⁷¹ is an apocalyptic number.

42571 is a deficient number, since it is larger than the sum of its proper divisors (1).

42571 is an equidigital number, since it uses as much as digits as its factorization.

42571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280, while the sum is 19.

The square root of 42571 is about 206.3274097157. The cubic root of 42571 is about 34.9170826298.

It can be divided in two parts, 425 and 71, that added together give a triangular number (496 = T₃₁).

The spelling of 42571 in words is "forty-two thousand, five hundred seventy-one".