11855943 has 48 divisors (see below), whose sum is σ = 20428800. Its totient is φ = 6771600.

The previous prime is 11855933. The next prime is 11855959. The reversal of 11855943 is 34955811.

11855943 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11855943 - 2⁵ = 11855911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11855898 and 11855907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11855903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61978 + ... + 62168.

It is an arithmetic number, because the mean of its divisors is an integer number (425600).

Almost surely, 2^11855943 is an apocalyptic number.

11855943 is the 2178-th heptagonal number.

11855943 is a deficient number, since it is larger than the sum of its proper divisors (8572857).

11855943 is a wasteful number, since it uses less digits than its factorization.

11855943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 224 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 11855943 is about 3443.2459976017. The cubic root of 11855943 is about 228.0230239907.

The spelling of 11855943 in words is "eleven million, eight hundred fifty-five thousand, nine hundred forty-three".