326621 has 4 divisors (see below), whose sum is σ = 345852. Its totient is φ = 307392.

The previous prime is 326617. The next prime is 326633. The reversal of 326621 is 126623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126623 = 7 ⋅18089.

It can be written as a sum of positive squares in 2 ways, for example, as 290521 + 36100 = 539^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 326621 - 2² = 326617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 326593 and 326602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326611) 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, 9590 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (86463).

2³²⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

326621 is a deficient number, since it is larger than the sum of its proper divisors (19231).

326621 is a wasteful number, since it uses less digits than its factorization.

326621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19230.

The product of its digits is 432, while the sum is 20.

The square root of 326621 is about 571.5076552418. The cubic root of 326621 is about 68.8675608427.

It can be divided in two parts, 3266 and 21, that multiplied together give a palindrome (68586).

The spelling of 326621 in words is "three hundred twenty-six thousand, six hundred twenty-one".