821432 has 8 divisors (see below), whose sum is σ = 1540200. Its totient is φ = 410712.

The previous prime is 821411. The next prime is 821441. The reversal of 821432 is 234128.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51332 + ... + 51347.

It is an arithmetic number, because the mean of its divisors is an integer number (192525).

2⁸²¹⁴³² is an apocalyptic number.

It is an amenable number.

821432 is a deficient number, since it is larger than the sum of its proper divisors (718768).

821432 is a wasteful number, since it uses less digits than its factorization.

821432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102685 (or 102681 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 821432 is about 906.3288586380. The cubic root of 821432 is about 93.6534698265.

The spelling of 821432 in words is "eight hundred twenty-one thousand, four hundred thirty-two".