11605543 has 4 divisors (see below), whose sum is σ = 12288240. Its totient is φ = 10922848.

The previous prime is 11605519. The next prime is 11605549. The reversal of 11605543 is 34550611.

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 11605543 - 2¹³ = 11597351 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 (11605549) 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, 341323 + ... + 341356.

It is an arithmetic number, because the mean of its divisors is an integer number (3072060).

Almost surely, 2^11605543 is an apocalyptic number.

11605543 is a deficient number, since it is larger than the sum of its proper divisors (682697).

11605543 is an equidigital number, since it uses as much as digits as its factorization.

11605543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682696.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 11605543 is about 3406.6909164173. The cubic root of 11605543 is about 226.4062900669.

The spelling of 11605543 in words is "eleven million, six hundred five thousand, five hundred forty-three".