822540 has 24 divisors (see below), whose sum is σ = 2303280. Its totient is φ = 219328.

The previous prime is 822539. The next prime is 822541. The reversal of 822540 is 45228.

It is an interprime number because it is at equal distance from previous prime (822539) and next prime (822541).

It is not an unprimeable number, because it can be changed into a prime (822541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6795 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (95970).

2⁸²²⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

822540 is an abundant number, since it is smaller than the sum of its proper divisors (1480740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

822540 is a wasteful number, since it uses less digits than its factorization.

822540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13721 (or 13719 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 822540 is about 906.9399098066. The cubic root of 822540 is about 93.6955595037.

Adding to 822540 its reverse (45228), we get a palindrome (867768).

The spelling of 822540 in words is "eight hundred twenty-two thousand, five hundred forty".