11242543 has 4 divisors (see below), whose sum is σ = 12107368. Its totient is φ = 10377720.

The previous prime is 11242531. The next prime is 11242549. The reversal of 11242543 is 34524211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34524211 = 3119 ⋅11069.

It is a cyclic number.

It is not a de Polignac number, because 11242543 - 2¹³ = 11234351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11242549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432393 + ... + 432418.

It is an arithmetic number, because the mean of its divisors is an integer number (3026842).

Almost surely, 2^11242543 is an apocalyptic number.

11242543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11242543 is a deficient number, since it is larger than the sum of its proper divisors (864825).

11242543 is an equidigital number, since it uses as much as digits as its factorization.

11242543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864824.

The product of its digits is 960, while the sum is 22.

The square root of 11242543 is about 3352.9901580530. The cubic root of 11242543 is about 224.0207184812.

Adding to 11242543 its reverse (34524211), we get a palindrome (45766754).

The spelling of 11242543 in words is "eleven million, two hundred forty-two thousand, five hundred forty-three".