11865211 has 2 divisors, whose sum is σ = 11865212. Its totient is φ = 11865210.

The previous prime is 11865199. The next prime is 11865221. The reversal of 11865211 is 11256811.

It is a happy number.

11865211 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11865211 - 2⁷ = 11865083 is a prime.

It is not a weakly prime, because it can be changed into another prime (11865221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932605 + 5932606.

It is an arithmetic number, because the mean of its divisors is an integer number (5932606).

Almost surely, 2^11865211 is an apocalyptic number.

11865211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865211 is an equidigital number, since it uses as much as digits as its factorization.

11865211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 25.

The square root of 11865211 is about 3444.5915577903. The cubic root of 11865211 is about 228.0824250566.

Subtracting from 11865211 its reverse (11256811), we obtain a square (608400 = 780²).

The spelling of 11865211 in words is "eleven million, eight hundred sixty-five thousand, two hundred eleven".