11285543 has 4 divisors (see below), whose sum is σ = 11305680. Its totient is φ = 11265408.

The previous prime is 11285513. The next prime is 11285551. The reversal of 11285543 is 34558211.

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 11285543 - 2¹⁶ = 11220007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11285503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9203 + ... + 10356.

It is an arithmetic number, because the mean of its divisors is an integer number (2826420).

Almost surely, 2^11285543 is an apocalyptic number.

11285543 is a deficient number, since it is larger than the sum of its proper divisors (20137).

11285543 is an equidigital number, since it uses as much as digits as its factorization.

11285543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20136.

The product of its digits is 4800, while the sum is 29.

The square root of 11285543 is about 3359.3962255143. The cubic root of 11285543 is about 224.3059634288.

The spelling of 11285543 in words is "eleven million, two hundred eighty-five thousand, five hundred forty-three".