11681217 has 12 divisors (see below), whose sum is σ = 17606784. Its totient is φ = 7448760.

The previous prime is 11681213. The next prime is 11681221. The reversal of 11681217 is 71218611.

11681217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11681213) and next prime (11681221).

It is not a de Polignac number, because 11681217 - 2² = 11681213 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11681213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28009 + ... + 28422.

It is an arithmetic number, because the mean of its divisors is an integer number (1467232).

Almost surely, 2^11681217 is an apocalyptic number.

It is an amenable number.

11681217 is a deficient number, since it is larger than the sum of its proper divisors (5925567).

11681217 is a wasteful number, since it uses less digits than its factorization.

11681217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56460 (or 56457 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 11681217 is about 3417.7795423345. The cubic root of 11681217 is about 226.8973187979.

Adding to 11681217 its reverse (71218611), we get a palindrome (82899828).

The spelling of 11681217 in words is "eleven million, six hundred eighty-one thousand, two hundred seventeen".