1326726321 has 8 divisors (see below), whose sum is σ = 1771856640. Its totient is φ = 883040112.

The previous prime is 1326726287. The next prime is 1326726329. The reversal of 1326726321 is 1236276231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1326726321 - 2¹⁵ = 1326693553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1326726329) 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, 358881 + ... + 362558.

It is an arithmetic number, because the mean of its divisors is an integer number (221482080).

Almost surely, 2^1326726321 is an apocalyptic number.

It is an amenable number.

1326726321 is a deficient number, since it is larger than the sum of its proper divisors (445130319).

1326726321 is an equidigital number, since it uses as much as digits as its factorization.

1326726321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722055.

The product of its digits is 18144, while the sum is 33.

The square root of 1326726321 is about 36424.2545702723. The cubic root of 1326726321 is about 1098.8214156296.

The spelling of 1326726321 in words is "one billion, three hundred twenty-six million, seven hundred twenty-six thousand, three hundred twenty-one".