13240321 has 8 divisors (see below), whose sum is σ = 14115200. Its totient is φ = 12383280.

The previous prime is 13240319. The next prime is 13240333. The reversal of 13240321 is 12304231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13240321 - 2¹ = 13240319 is a prime.

It is a super-2 number, since 2×13240321² = 350612200366082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13240295 and 13240304.

It is not an unprimeable number, because it can be changed into a prime (13240391) 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, 2910 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (1764400).

Almost surely, 2^13240321 is an apocalyptic number.

It is an amenable number.

13240321 is a deficient number, since it is larger than the sum of its proper divisors (874879).

13240321 is an equidigital number, since it uses as much as digits as its factorization.

13240321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13240321 is about 3638.7251888539. The cubic root of 13240321 is about 236.5735415756.

Adding to 13240321 its reverse (12304231), we get a palindrome (25544552).

The spelling of 13240321 in words is "thirteen million, two hundred forty thousand, three hundred twenty-one".