28571 has 2 divisors, whose sum is σ = 28572. Its totient is φ = 28570.

The previous prime is 28559. The next prime is 28573. The reversal of 28571 is 17582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28571 is a prime.

It is a Sophie Germain prime.

Together with 28573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28573) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285 + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (14286).

2²⁸⁵⁷¹ is an apocalyptic number.

28571 is a deficient number, since it is larger than the sum of its proper divisors (1).

28571 is an equidigital number, since it uses as much as digits as its factorization.

28571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 23.

The square root of 28571 is about 169.0295832096. The cubic root of 28571 is about 30.5709180172.

The spelling of 28571 in words is "twenty-eight thousand, five hundred seventy-one".