821802 has 16 divisors (see below), whose sum is σ = 1700640. Its totient is φ = 264432.

The previous prime is 821801. The next prime is 821803. The reversal of 821802 is 208128.

It is an interprime number because it is at equal distance from previous prime (821801) and next prime (821803).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 821802.

It is not an unprimeable number, because it can be changed into a prime (821801) 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, 2188 + ... + 2535.

It is an arithmetic number, because the mean of its divisors is an integer number (106290).

2⁸²¹⁸⁰² is an apocalyptic number.

821802 is an abundant number, since it is smaller than the sum of its proper divisors (878838).

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

821802 is a wasteful number, since it uses less digits than its factorization.

821802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757.

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

The square root of 821802 is about 906.5329558268. The cubic root of 821802 is about 93.6675292505.

The spelling of 821802 in words is "eight hundred twenty-one thousand, eight hundred two".