12131269 has 2 divisors, whose sum is σ = 12131270. Its totient is φ = 12131268.

The previous prime is 12131267. The next prime is 12131293. The reversal of 12131269 is 96213121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8191044 + 3940225 = 2862^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131269 - 2¹ = 12131267 is a prime.

It is a super-2 number, since 2×12131269² = 294335375100722, which contains 22 as substring.

Together with 12131267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131267) by changing a digit.

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 as a sum of consecutive naturals, namely, 6065634 + 6065635.

It is an arithmetic number, because the mean of its divisors is an integer number (6065635).

Almost surely, 2^12131269 is an apocalyptic number.

It is an amenable number.

12131269 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131269 is an equidigital number, since it uses as much as digits as its factorization.

12131269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 12131269 is about 3482.9971289107. The cubic root of 12131269 is about 229.7746311631.

The spelling of 12131269 in words is "twelve million, one hundred thirty-one thousand, two hundred sixty-nine".