326260021 has 4 divisors (see below), whose sum is σ = 326316844. Its totient is φ = 326203200.

The previous prime is 326260003. The next prime is 326260031. The reversal of 326260021 is 120062623.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 258855921 + 67404100 = 16089^2 + 8210^2 .

It is a cyclic number.

It is not a de Polignac number, because 326260021 - 2¹⁹ = 325735733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 326259974 and 326260001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326260031) 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, 18690 + ... + 31651.

It is an arithmetic number, because the mean of its divisors is an integer number (81579211).

Almost surely, 2^326260021 is an apocalyptic number.

It is an amenable number.

326260021 is a deficient number, since it is larger than the sum of its proper divisors (56823).

326260021 is an equidigital number, since it uses as much as digits as its factorization.

326260021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56822.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 326260021 is about 18062.6692656429. The cubic root of 326260021 is about 688.4218085881.

The spelling of 326260021 in words is "three hundred twenty-six million, two hundred sixty thousand, twenty-one".