11543671 has 4 divisors (see below), whose sum is σ = 11550600. Its totient is φ = 11536744.

The previous prime is 11543657. The next prime is 11543681. The reversal of 11543671 is 17634511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17634511 = 3803 ⋅4637.

It is a cyclic number.

It is not a de Polignac number, because 11543671 - 2⁵ = 11543639 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 (11543641) 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, 720 + ... + 4858.

It is an arithmetic number, because the mean of its divisors is an integer number (2887650).

Almost surely, 2^11543671 is an apocalyptic number.

11543671 is a deficient number, since it is larger than the sum of its proper divisors (6929).

11543671 is an equidigital number, since it uses as much as digits as its factorization.

11543671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928.

The product of its digits is 2520, while the sum is 28.

The square root of 11543671 is about 3397.5978278778. The cubic root of 11543671 is about 226.0032304339.

The spelling of 11543671 in words is "eleven million, five hundred forty-three thousand, six hundred seventy-one".