12072289 has 4 divisors (see below), whose sum is σ = 12159280. Its totient is φ = 11985300.

The previous prime is 12072283. The next prime is 12072301. The reversal of 12072289 is 98227021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12072289 - 2⁵ = 12072257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12072289.

It is not an unprimeable number, because it can be changed into a prime (12072283) 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 3 ways as a sum of consecutive naturals, for example, 43287 + ... + 43564.

It is an arithmetic number, because the mean of its divisors is an integer number (3039820).

Almost surely, 2^12072289 is an apocalyptic number.

It is an amenable number.

12072289 is a deficient number, since it is larger than the sum of its proper divisors (86991).

12072289 is an equidigital number, since it uses as much as digits as its factorization.

12072289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86990.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12072289 is about 3474.5199668443. The cubic root of 12072289 is about 229.4016520494.

The spelling of 12072289 in words is "twelve million, seventy-two thousand, two hundred eighty-nine".