821326 has 16 divisors (see below), whose sum is σ = 1381680. Its totient is φ = 362880.

The previous prime is 821311. The next prime is 821329. The reversal of 821326 is 623128.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 821297 and 821306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310 + ... + 1318.

It is an arithmetic number, because the mean of its divisors is an integer number (86355).

2⁸²¹³²⁶ is an apocalyptic number.

821326 is a deficient number, since it is larger than the sum of its proper divisors (560354).

821326 is a wasteful number, since it uses less digits than its factorization.

821326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059.

The product of its digits is 576, while the sum is 22.

The square root of 821326 is about 906.2703790812. The cubic root of 821326 is about 93.6494412135.

The spelling of 821326 in words is "eight hundred twenty-one thousand, three hundred twenty-six".