12073561 has 4 divisors (see below), whose sum is σ = 12091300. Its totient is φ = 12055824.

The previous prime is 12073549. The next prime is 12073571. The reversal of 12073561 is 16537021.

12073561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 6579225 = 2344^2 + 2565^2 .

It is a cyclic number.

It is not a de Polignac number, because 12073561 - 2⁹ = 12073049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12073511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7806 + ... + 9223.

It is an arithmetic number, because the mean of its divisors is an integer number (3022825).

Almost surely, 2^12073561 is an apocalyptic number.

It is an amenable number.

12073561 is a deficient number, since it is larger than the sum of its proper divisors (17739).

12073561 is an equidigital number, since it uses as much as digits as its factorization.

12073561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17738.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 12073561 is about 3474.7030088916. The cubic root of 12073561 is about 229.4097087555.

The spelling of 12073561 in words is "twelve million, seventy-three thousand, five hundred sixty-one".