15243 has 4 divisors (see below), whose sum is σ = 20328. Its totient is φ = 10160.

The previous prime is 15241. The next prime is 15259. The reversal of 15243 is 34251.

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

It is a cyclic number.

It is not a de Polignac number, because 15243 - 2¹ = 15241 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (15241) 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, 2538 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (5082).

2¹⁵²⁴³ is an apocalyptic number.

15243 is a deficient number, since it is larger than the sum of its proper divisors (5085).

15243 is an equidigital number, since it uses as much as digits as its factorization.

15243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its digits is 120, while the sum is 15.

The square root of 15243 is about 123.4625449276. The cubic root of 15243 is about 24.7945834511.

Adding to 15243 its reverse (34251), we get a palindrome (49494).

The spelling of 15243 in words is "fifteen thousand, two hundred forty-three".