11086721 has 4 divisors (see below), whose sum is σ = 11242944. Its totient is φ = 10930500.

The previous prime is 11086711. The next prime is 11086727. The reversal of 11086721 is 12768011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12768011 = 3121 ⋅4091.

It is a cyclic number.

It is not a de Polignac number, because 11086721 - 2⁶ = 11086657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11086727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78005 + ... + 78146.

It is an arithmetic number, because the mean of its divisors is an integer number (2810736).

Almost surely, 2^11086721 is an apocalyptic number.

It is an amenable number.

11086721 is a deficient number, since it is larger than the sum of its proper divisors (156223).

11086721 is an equidigital number, since it uses as much as digits as its factorization.

11086721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156222.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 11086721 is about 3329.6728067484. The cubic root of 11086721 is about 222.9809216386.

The spelling of 11086721 in words is "eleven million, eighty-six thousand, seven hundred twenty-one".