11543243 has 4 divisors (see below), whose sum is σ = 11689440. Its totient is φ = 11397048.

The previous prime is 11543227. The next prime is 11543249. The reversal of 11543243 is 34234511.

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 11543243 - 2⁴ = 11543227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543249) 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, 72980 + ... + 73137.

It is an arithmetic number, because the mean of its divisors is an integer number (2922360).

Almost surely, 2^11543243 is an apocalyptic number.

11543243 is a deficient number, since it is larger than the sum of its proper divisors (146197).

11543243 is an equidigital number, since it uses as much as digits as its factorization.

11543243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146196.

The product of its digits is 1440, while the sum is 23.

The square root of 11543243 is about 3397.5348416168. The cubic root of 11543243 is about 226.0004372561. Note that the first 3 decimals are identical.

Adding to 11543243 its reverse (34234511), we get a palindrome (45777754).

The spelling of 11543243 in words is "eleven million, five hundred forty-three thousand, two hundred forty-three".