12111445 has 4 divisors (see below), whose sum is σ = 14533740. Its totient is φ = 9689152.

The previous prime is 12111439. The next prime is 12111479. The reversal of 12111445 is 54411121.

12111445 is digitally balanced in base 3, 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 6922161 + 5189284 = 2631^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111445 - 2⁹ = 12110933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211140 + ... + 1211149.

It is an arithmetic number, because the mean of its divisors is an integer number (3633435).

Almost surely, 2^12111445 is an apocalyptic number.

It is an amenable number.

12111445 is a deficient number, since it is larger than the sum of its proper divisors (2422295).

12111445 is an equidigital number, since it uses as much as digits as its factorization.

12111445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422294.

The product of its digits is 160, while the sum is 19.

The square root of 12111445 is about 3480.1501404393. The cubic root of 12111445 is about 229.6494028319.

Adding to 12111445 its reverse (54411121), we get a palindrome (66522566).

The spelling of 12111445 in words is "twelve million, one hundred eleven thousand, four hundred forty-five".