822287 has 4 divisors (see below), whose sum is σ = 828696. Its totient is φ = 815880.

The previous prime is 822277. The next prime is 822293. The reversal of 822287 is 782228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 822287 - 2⁶ = 822223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3008 + ... + 3269.

It is an arithmetic number, because the mean of its divisors is an integer number (207174).

2⁸²²²⁸⁷ is an apocalyptic number.

822287 is a deficient number, since it is larger than the sum of its proper divisors (6409).

822287 is a wasteful number, since it uses less digits than its factorization.

822287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6408.

The product of its digits is 3584, while the sum is 29.

The square root of 822287 is about 906.8004190559. The cubic root of 822287 is about 93.6859521057.

The spelling of 822287 in words is "eight hundred twenty-two thousand, two hundred eighty-seven".