11108561 has 8 divisors (see below), whose sum is σ = 11260800. Its totient is φ = 10957680.

The previous prime is 11108551. The next prime is 11108567. The reversal of 11108561 is 16580111.

It is a happy number.

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 11108561 - 2¹⁸ = 10846417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11108567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40856 + ... + 41126.

It is an arithmetic number, because the mean of its divisors is an integer number (1407600).

Almost surely, 2^11108561 is an apocalyptic number.

It is an amenable number.

11108561 is a deficient number, since it is larger than the sum of its proper divisors (152239).

11108561 is a wasteful number, since it uses less digits than its factorization.

11108561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11108561 is about 3332.9507947163. The cubic root of 11108561 is about 223.1272441038.

Adding to 11108561 its reverse (16580111), we get a palindrome (27688672).

The spelling of 11108561 in words is "eleven million, one hundred eight thousand, five hundred sixty-one".