821466 has 24 divisors (see below), whose sum is σ = 1819584. Its totient is φ = 267720.

The previous prime is 821461. The next prime is 821467. The reversal of 821466 is 664128.

It is not an unprimeable number, because it can be changed into a prime (821461) by changing a digit.

821466 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (75816).

2⁸²¹⁴⁶⁶ is an apocalyptic number.

821466 is an abundant number, since it is smaller than the sum of its proper divisors (998118).

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

821466 is a wasteful number, since it uses less digits than its factorization.

821466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1023 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 821466 is about 906.3476154324. The cubic root of 821466 is about 93.6547619497.

The spelling of 821466 in words is "eight hundred twenty-one thousand, four hundred sixty-six".