821282 has 16 divisors (see below), whose sum is σ = 1536192. Its totient is φ = 319920.

The previous prime is 821281. The next prime is 821291. The reversal of 821282 is 282128.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (821281) 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, 2513 + ... + 2820.

It is an arithmetic number, because the mean of its divisors is an integer number (96012).

2⁸²¹²⁸² is an apocalyptic number.

821282 is a deficient number, since it is larger than the sum of its proper divisors (714910).

821282 is a wasteful number, since it uses less digits than its factorization.

821282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353.

The product of its digits is 512, while the sum is 23.

The square root of 821282 is about 906.2461034399. The cubic root of 821282 is about 93.6477688573.

The spelling of 821282 in words is "eight hundred twenty-one thousand, two hundred eighty-two".