11881543 has 4 divisors (see below), whose sum is σ = 11908000. Its totient is φ = 11855088.

The previous prime is 11881531. The next prime is 11881567. The reversal of 11881543 is 34518811.

11881543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34518811 = 353 ⋅97787.

It is a cyclic number.

It is not a de Polignac number, because 11881543 - 2⁵ = 11881511 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 (11881343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12543 + ... + 13456.

It is an arithmetic number, because the mean of its divisors is an integer number (2977000).

Almost surely, 2^11881543 is an apocalyptic number.

11881543 is a deficient number, since it is larger than the sum of its proper divisors (26457).

11881543 is an equidigital number, since it uses as much as digits as its factorization.

11881543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26456.

The product of its digits is 3840, while the sum is 31.

The square root of 11881543 is about 3446.9614155079. The cubic root of 11881543 is about 228.1870259312.

The spelling of 11881543 in words is "eleven million, eight hundred eighty-one thousand, five hundred forty-three".