12167561 has 16 divisors (see below), whose sum is σ = 14446080. Its totient is φ = 10031040.

The previous prime is 12167537. The next prime is 12167569. The reversal of 12167561 is 16576121.

12167561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12167561 - 2⁶ = 12167497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12167569) 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, 28016 + ... + 28446.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^12167561 is an apocalyptic number.

It is an amenable number.

12167561 is a deficient number, since it is larger than the sum of its proper divisors (2278519).

12167561 is a wasteful number, since it uses less digits than its factorization.

12167561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its digits is 2520, while the sum is 29.

The square root of 12167561 is about 3488.2031190858. The cubic root of 12167561 is about 230.0035349173.

The spelling of 12167561 in words is "twelve million, one hundred sixty-seven thousand, five hundred sixty-one".