821452 has 12 divisors (see below), whose sum is σ = 1449000. Its totient is φ = 407456.

The previous prime is 821449. The next prime is 821459. The reversal of 821452 is 254128.

It is not an unprimeable number, because it can be changed into a prime (821459) 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, 202 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (120750).

2⁸²¹⁴⁵² is an apocalyptic number.

It is an amenable number.

821452 is a deficient number, since it is larger than the sum of its proper divisors (627548).

821452 is a wasteful number, since it uses less digits than its factorization.

821452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1638 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 821452 is about 906.3398920935. The cubic root of 821452 is about 93.6542299033.

The spelling of 821452 in words is "eight hundred twenty-one thousand, four hundred fifty-two".