13305243 has 8 divisors (see below), whose sum is σ = 20274688. Its totient is φ = 7602984.

The previous prime is 13305241. The next prime is 13305307. The reversal of 13305243 is 34250331.

13305243 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13305243 - 2¹ = 13305241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 633583 = 13305243 / (1 + 3 + 3 + 0 + 5 + 2 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (13305241) 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, 316771 + ... + 316812.

It is an arithmetic number, because the mean of its divisors is an integer number (2534336).

Almost surely, 2^13305243 is an apocalyptic number.

13305243 is a deficient number, since it is larger than the sum of its proper divisors (6969445).

13305243 is an equidigital number, since it uses as much as digits as its factorization.

13305243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633593.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 13305243 is about 3647.6352613714. The cubic root of 13305243 is about 236.9595793552.

Adding to 13305243 its reverse (34250331), we get a palindrome (47555574).

The spelling of 13305243 in words is "thirteen million, three hundred five thousand, two hundred forty-three".