12164545 has 4 divisors (see below), whose sum is σ = 14597460. Its totient is φ = 9731632.

The previous prime is 12164533. The next prime is 12164549. The reversal of 12164545 is 54546121.

12164545 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, and also an emirpimes, since its reverse is a distinct semiprime: 54546121 = 7 ⋅7792303.

It can be written as a sum of positive squares in 2 ways, for example, as 8928144 + 3236401 = 2988^2 + 1799^2 .

It is a cyclic number.

It is not a de Polignac number, because 12164545 - 2⁵ = 12164513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12164549) by changing a digit.

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, 1216450 + ... + 1216459.

It is an arithmetic number, because the mean of its divisors is an integer number (3649365).

Almost surely, 2^12164545 is an apocalyptic number.

It is an amenable number.

12164545 is a deficient number, since it is larger than the sum of its proper divisors (2432915).

12164545 is an equidigital number, since it uses as much as digits as its factorization.

12164545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432914.

The product of its digits is 4800, while the sum is 28.

The square root of 12164545 is about 3487.7707780185. The cubic root of 12164545 is about 229.9845295202.

The spelling of 12164545 in words is "twelve million, one hundred sixty-four thousand, five hundred forty-five".