821208 has 16 divisors (see below), whose sum is σ = 2053080. Its totient is φ = 273728.

The previous prime is 821207. The next prime is 821209. The reversal of 821208 is 802128.

821208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (821207) and next prime (821209).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821207) 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, 17085 + ... + 17132.

2⁸²¹²⁰⁸ is an apocalyptic number.

It is an amenable number.

821208 is an abundant number, since it is smaller than the sum of its proper divisors (1231872).

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

821208 is a wasteful number, since it uses less digits than its factorization.

821208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34226 (or 34222 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 821208 is about 906.2052747584. The cubic root of 821208 is about 93.6449561234.

It can be divided in two parts, 82120 and 8, that added together give a palindrome (82128).

The spelling of 821208 in words is "eight hundred twenty-one thousand, two hundred eight".