12227861 has 4 divisors (see below), whose sum is σ = 12234924. Its totient is φ = 12220800.

The previous prime is 12227837. The next prime is 12227863. The reversal of 12227861 is 16872221.

12227861 is digitally balanced in base 2, 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 a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6728836 + 5499025 = 2594^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 12227861 - 2¹⁴ = 12211477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12227863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (3058731).

Almost surely, 2^12227861 is an apocalyptic number.

It is an amenable number.

12227861 is a deficient number, since it is larger than the sum of its proper divisors (7063).

12227861 is an equidigital number, since it uses as much as digits as its factorization.

12227861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062.

The product of its digits is 2688, while the sum is 29.

The square root of 12227861 is about 3496.8358554556. The cubic root of 12227861 is about 230.3828595004.

The spelling of 12227861 in words is "twelve million, two hundred twenty-seven thousand, eight hundred sixty-one".