11217961 has 8 divisors (see below), whose sum is σ = 12003200. Its totient is φ = 10452240.

The previous prime is 11217959. The next prime is 11217989. The reversal of 11217961 is 16971211.

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

It is a cyclic number.

It is not a de Polignac number, because 11217961 - 2¹ = 11217959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11217911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3681 + ... + 5998.

It is an arithmetic number, because the mean of its divisors is an integer number (1500400).

Almost surely, 2^11217961 is an apocalyptic number.

It is an amenable number.

11217961 is a deficient number, since it is larger than the sum of its proper divisors (785239).

11217961 is an equidigital number, since it uses as much as digits as its factorization.

11217961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9759.

The product of its digits is 756, while the sum is 28.

The square root of 11217961 is about 3349.3224687987. The cubic root of 11217961 is about 223.8573243745.

The spelling of 11217961 in words is "eleven million, two hundred seventeen thousand, nine hundred sixty-one".