12108561 has 16 divisors (see below), whose sum is σ = 16570368. Its totient is φ = 7862400.

The previous prime is 12108559. The next prime is 12108581. The reversal of 12108561 is 16580121.

It is not a de Polignac number, because 12108561 - 2¹ = 12108559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12108521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22981 + ... + 23501.

It is an arithmetic number, because the mean of its divisors is an integer number (1035648).

Almost surely, 2^12108561 is an apocalyptic number.

It is an amenable number.

12108561 is a deficient number, since it is larger than the sum of its proper divisors (4461807).

12108561 is a wasteful number, since it uses less digits than its factorization.

12108561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12108561 is about 3479.7357658305. The cubic root of 12108561 is about 229.6311732026.

Adding to 12108561 its reverse (16580121), we get a palindrome (28688682).

The spelling of 12108561 in words is "twelve million, one hundred eight thousand, five hundred sixty-one".