12127261 has 2 divisors, whose sum is σ = 12127262. Its totient is φ = 12127260.

The previous prime is 12127243. The next prime is 12127289. The reversal of 12127261 is 16272121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 1038361 = 3330^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 12127261 - 2⁹ = 12126749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12127061) 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 as a sum of consecutive naturals, namely, 6063630 + 6063631.

It is an arithmetic number, because the mean of its divisors is an integer number (6063631).

Almost surely, 2^12127261 is an apocalyptic number.

It is an amenable number.

12127261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12127261 is an equidigital number, since it uses as much as digits as its factorization.

12127261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 12127261 is about 3482.4217148416. The cubic root of 12127261 is about 229.7493236111.

Adding to 12127261 its reverse (16272121), we get a palindrome (28399382).

The spelling of 12127261 in words is "twelve million, one hundred twenty-seven thousand, two hundred sixty-one".