11087721 has 12 divisors (see below), whose sum is σ = 16209648. Its totient is φ = 7302264.

The previous prime is 11087719. The next prime is 11087731. The reversal of 11087721 is 12778011.

It is not a de Polignac number, because 11087721 - 2¹ = 11087719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11087701) 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 in 11 ways as a sum of consecutive naturals, for example, 6675 + ... + 8168.

It is an arithmetic number, because the mean of its divisors is an integer number (1350804).

Almost surely, 2^11087721 is an apocalyptic number.

It is an amenable number.

11087721 is a deficient number, since it is larger than the sum of its proper divisors (5121927).

11087721 is a wasteful number, since it uses less digits than its factorization.

11087721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14932 (or 14929 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 11087721 is about 3329.8229682672. The cubic root of 11087721 is about 222.9876255811.

The spelling of 11087721 in words is "eleven million, eighty-seven thousand, seven hundred twenty-one".