11217865 has 8 divisors (see below), whose sum is σ = 13624128. Its totient is φ = 8865840.

The previous prime is 11217853. The next prime is 11217881. The reversal of 11217865 is 56871211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11217865 - 2⁷ = 11217737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 13101 + ... + 13930.

It is an arithmetic number, because the mean of its divisors is an integer number (1703016).

Almost surely, 2^11217865 is an apocalyptic number.

It is an amenable number.

11217865 is a deficient number, since it is larger than the sum of its proper divisors (2406263).

11217865 is an equidigital number, since it uses as much as digits as its factorization.

11217865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27119.

The product of its digits is 3360, while the sum is 31.

The square root of 11217865 is about 3349.3081375114. The cubic root of 11217865 is about 223.8566858044.

The spelling of 11217865 in words is "eleven million, two hundred seventeen thousand, eight hundred sixty-five".