12781227 has 8 divisors (see below), whose sum is σ = 17404416. Its totient is φ = 8339432.

The previous prime is 12781193. The next prime is 12781267. The reversal of 12781227 is 72218721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12781227 - 2¹⁵ = 12748459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12781194 and 12781203.

It is not an unprimeable number, because it can be changed into a prime (12781267) 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 7 ways as a sum of consecutive naturals, for example, 45183 + ... + 45464.

It is an arithmetic number, because the mean of its divisors is an integer number (2175552).

Almost surely, 2^12781227 is an apocalyptic number.

12781227 is a deficient number, since it is larger than the sum of its proper divisors (4623189).

12781227 is an equidigital number, since it uses as much as digits as its factorization.

12781227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90697.

The product of its digits is 3136, while the sum is 30.

The square root of 12781227 is about 3575.0841948128. The cubic root of 12781227 is about 233.8070035512.

Adding to 12781227 its reverse (72218721), we get a palindrome (84999948).

The spelling of 12781227 in words is "twelve million, seven hundred eighty-one thousand, two hundred twenty-seven".