12065561 has 8 divisors (see below), whose sum is σ = 12373824. Its totient is φ = 11761200.

The previous prime is 12065549. The next prime is 12065567. The reversal of 12065561 is 16556021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12065561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12065561.

It is not an unprimeable number, because it can be changed into a prime (12065567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5876 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (1546728).

Almost surely, 2^12065561 is an apocalyptic number.

It is an amenable number.

12065561 is a deficient number, since it is larger than the sum of its proper divisors (308263).

12065561 is a wasteful number, since it uses less digits than its factorization.

12065561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12065561 is about 3473.5516406122. The cubic root of 12065561 is about 229.3590282320.

The spelling of 12065561 in words is "twelve million, sixty-five thousand, five hundred sixty-one".