821874 has 8 divisors (see below), whose sum is σ = 1643760. Its totient is φ = 273956.

The previous prime is 821869. The next prime is 821879. The reversal of 821874 is 478128.

It is an interprime number because it is at equal distance from previous prime (821869) and next prime (821879).

It is a sphenic number, since it is the product of 3 distinct primes.

821874 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 821874.

It is not an unprimeable number, because it can be changed into a prime (821879) 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, 68484 + ... + 68495.

It is an arithmetic number, because the mean of its divisors is an integer number (205470).

2⁸²¹⁸⁷⁴ is an apocalyptic number.

821874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

821874 is a wasteful number, since it uses less digits than its factorization.

821874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136984.

The product of its digits is 3584, while the sum is 30.

The square root of 821874 is about 906.5726666958. The cubic root of 821874 is about 93.6702646479.

The spelling of 821874 in words is "eight hundred twenty-one thousand, eight hundred seventy-four".