11855843 has 4 divisors (see below), whose sum is σ = 11942520. Its totient is φ = 11769168.

The previous prime is 11855839. The next prime is 11855869. The reversal of 11855843 is 34855811.

11855843 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 11855843 - 2² = 11855839 is a prime.

It is a super-2 number, since 2×11855843² = 281122026481298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11855813) 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, 43133 + ... + 43406.

It is an arithmetic number, because the mean of its divisors is an integer number (2985630).

Almost surely, 2^11855843 is an apocalyptic number.

11855843 is a deficient number, since it is larger than the sum of its proper divisors (86677).

11855843 is an equidigital number, since it uses as much as digits as its factorization.

11855843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86676.

The product of its digits is 19200, while the sum is 35.

The square root of 11855843 is about 3443.2314763896. The cubic root of 11855843 is about 228.0223828954.

The spelling of 11855843 in words is "eleven million, eight hundred fifty-five thousand, eight hundred forty-three".