12690071 has 2 divisors, whose sum is σ = 12690072. Its totient is φ = 12690070.

The previous prime is 12690061. The next prime is 12690077. The reversal of 12690071 is 17009621.

It is a strong prime.

It is an emirp because it is prime and its reverse (17009621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12690071 is a prime.

It is a super-2 number, since 2×12690071² = 322075803970082, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12690071.

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, 6345035 + 6345036.

It is an arithmetic number, because the mean of its divisors is an integer number (6345036).

Almost surely, 2^12690071 is an apocalyptic number.

12690071 is a deficient number, since it is larger than the sum of its proper divisors (1).

12690071 is an equidigital number, since it uses as much as digits as its factorization.

12690071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 12690071 is about 3562.3125915618. The cubic root of 12690071 is about 233.2498379262.

Adding to 12690071 its reverse (17009621), we get a palindrome (29699692).

The spelling of 12690071 in words is "twelve million, six hundred ninety thousand, seventy-one".