821492 has 12 divisors (see below), whose sum is σ = 1643040. Its totient is φ = 352056.

The previous prime is 821489. The next prime is 821497. The reversal of 821492 is 294128.

821492 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821497) 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, 14642 + ... + 14697.

It is an arithmetic number, because the mean of its divisors is an integer number (136920).

2⁸²¹⁴⁹² is an apocalyptic number.

It is an amenable number.

821492 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.

821492 is a wasteful number, since it uses less digits than its factorization.

821492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29350 (or 29348 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 821492 is about 906.3619586015. The cubic root of 821492 is about 93.6557500199.

The spelling of 821492 in words is "eight hundred twenty-one thousand, four hundred ninety-two".