12690277 has 2 divisors, whose sum is σ = 12690278. Its totient is φ = 12690276.

The previous prime is 12690263. The next prime is 12690281. The reversal of 12690277 is 77209621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12383361 + 306916 = 3519^2 + 554^2 .

It is an emirp because it is prime and its reverse (77209621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12690277 - 2²³ = 4301669 is a prime.

It is a super-2 number, since 2×12690277² = 322086260673458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12690077) 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, 6345138 + 6345139.

It is an arithmetic number, because the mean of its divisors is an integer number (6345139).

Almost surely, 2^12690277 is an apocalyptic number.

It is an amenable number.

12690277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12690277 is an equidigital number, since it uses as much as digits as its factorization.

12690277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 12690277 is about 3562.3415052462. The cubic root of 12690277 is about 233.2511000470.

Adding to 12690277 its reverse (77209621), we get a palindrome (89899898).

The spelling of 12690277 in words is "twelve million, six hundred ninety thousand, two hundred seventy-seven".