822671 has 2 divisors, whose sum is σ = 822672. Its totient is φ = 822670.

The previous prime is 822667. The next prime is 822673. The reversal of 822671 is 176228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 822671 - 2² = 822667 is a prime.

Together with 822673, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₆₅₆₁₈ and since 822671 and 65618 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 822671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822673) 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 as a sum of consecutive naturals, namely, 411335 + 411336.

It is an arithmetic number, because the mean of its divisors is an integer number (411336).

2⁸²²⁶⁷¹ is an apocalyptic number.

822671 is a deficient number, since it is larger than the sum of its proper divisors (1).

822671 is an equidigital number, since it uses as much as digits as its factorization.

822671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 822671 is about 907.0121278131. The cubic root of 822671 is about 93.7005333112.

Adding to 822671 its reverse (176228), we get a palindrome (998899).

The spelling of 822671 in words is "eight hundred twenty-two thousand, six hundred seventy-one".