565771 has 2 divisors, whose sum is σ = 565772. Its totient is φ = 565770.

The previous prime is 565769. The next prime is 565787. The reversal of 565771 is 177565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 565771 - 2¹ = 565769 is a prime.

Together with 565769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (565171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282885 + 282886.

It is an arithmetic number, because the mean of its divisors is an integer number (282886).

2⁵⁶⁵⁷⁷¹ is an apocalyptic number.

565771 is a deficient number, since it is larger than the sum of its proper divisors (1).

565771 is an equidigital number, since it uses as much as digits as its factorization.

565771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 565771 is about 752.1775056461. The cubic root of 565771 is about 82.7078810125.

The spelling of 565771 in words is "five hundred sixty-five thousand, seven hundred seventy-one".