12227945 has 16 divisors (see below), whose sum is σ = 15202128. Its totient is φ = 9434880.

The previous prime is 12227921. The next prime is 12227951. The reversal of 12227945 is 54972221.

It can be written as a sum of positive squares in 8 ways, for example, as 1125721 + 11102224 = 1061^2 + 3332^2 .

It is not a de Polignac number, because 12227945 - 2¹⁴ = 12211561 is a prime.

It is a Duffinian number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 28835 + ... + 29255.

It is an arithmetic number, because the mean of its divisors is an integer number (950133).

Almost surely, 2^12227945 is an apocalyptic number.

It is an amenable number.

12227945 is a deficient number, since it is larger than the sum of its proper divisors (2974183).

12227945 is a wasteful number, since it uses less digits than its factorization.

12227945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its digits is 10080, while the sum is 32.

The square root of 12227945 is about 3496.8478662933. The cubic root of 12227945 is about 230.3833870420.

The spelling of 12227945 in words is "twelve million, two hundred twenty-seven thousand, nine hundred forty-five".