11865243 has 16 divisors (see below), whose sum is σ = 17110016. Its totient is φ = 7270560.

The previous prime is 11865241. The next prime is 11865257. The reversal of 11865243 is 34256811.

11865243 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 11865243 - 2¹ = 11865241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11865243.

It is not an unprimeable number, because it can be changed into a prime (11865241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11478 + ... + 12468.

It is an arithmetic number, because the mean of its divisors is an integer number (1069376).

Almost surely, 2^11865243 is an apocalyptic number.

11865243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11865243 is a deficient number, since it is larger than the sum of its proper divisors (5244773).

11865243 is a wasteful number, since it uses less digits than its factorization.

11865243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its digits is 5760, while the sum is 30.

The square root of 11865243 is about 3444.5962027500. The cubic root of 11865243 is about 228.0826300994.

The spelling of 11865243 in words is "eleven million, eight hundred sixty-five thousand, two hundred forty-three".