12227905 has 4 divisors (see below), whose sum is σ = 14673492. Its totient is φ = 9782320.

The previous prime is 12227903. The next prime is 12227909. The reversal of 12227905 is 50972221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50972221 = 617 ⋅82613.

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 3560769 = 2944^2 + 1887^2 .

It is not a de Polignac number, because 12227905 - 2¹ = 12227903 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12227903) 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, 1222786 + ... + 1222795.

It is an arithmetic number, because the mean of its divisors is an integer number (3668373).

Almost surely, 2^12227905 is an apocalyptic number.

It is an amenable number.

12227905 is a deficient number, since it is larger than the sum of its proper divisors (2445587).

12227905 is an equidigital number, since it uses as much as digits as its factorization.

12227905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445586.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12227905 is about 3496.8421468519. The cubic root of 12227905 is about 230.3831358320.

The spelling of 12227905 in words is "twelve million, two hundred twenty-seven thousand, nine hundred five".