11787543 has 24 divisors (see below), whose sum is σ = 18548400. Its totient is φ = 7185024.

The previous prime is 11787527. The next prime is 11787583. The reversal of 11787543 is 34578711.

It is not a de Polignac number, because 11787543 - 2⁴ = 11787527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11787498 and 11787507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11787583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3771 + ... + 6147.

It is an arithmetic number, because the mean of its divisors is an integer number (772850).

Almost surely, 2^11787543 is an apocalyptic number.

11787543 is a deficient number, since it is larger than the sum of its proper divisors (6760857).

11787543 is a wasteful number, since it uses less digits than its factorization.

11787543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2428 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 11787543 is about 3433.2991422246. The cubic root of 11787543 is about 227.5836700653.

The spelling of 11787543 in words is "eleven million, seven hundred eighty-seven thousand, five hundred forty-three".