326821 has 12 divisors (see below), whose sum is σ = 373996. Its totient is φ = 285120.

The previous prime is 326779. The next prime is 326831. The reversal of 326821 is 128623.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 81796 = 495^2 + 286^2 .

It is not a de Polignac number, because 326821 - 2⁷ = 326693 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 326792 and 326801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4441 + ... + 4513.

2³²⁶⁸²¹ is an apocalyptic number.

It is an amenable number.

326821 is a deficient number, since it is larger than the sum of its proper divisors (47175).

326821 is a wasteful number, since it uses less digits than its factorization.

326821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 121 counting only the distinct ones).

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

The square root of 326821 is about 571.6826042482. The cubic root of 326821 is about 68.8816145439.

The spelling of 326821 in words is "three hundred twenty-six thousand, eight hundred twenty-one".