12626539 has 2 divisors, whose sum is σ = 12626540. Its totient is φ = 12626538.

The previous prime is 12626533. The next prime is 12626543. The reversal of 12626539 is 93562621.

It is a strong prime.

It is an emirp because it is prime and its reverse (93562621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12626539 - 2⁹ = 12626027 is a prime.

It is not a weakly prime, because it can be changed into another prime (12626533) 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, 6313269 + 6313270.

It is an arithmetic number, because the mean of its divisors is an integer number (6313270).

Almost surely, 2^12626539 is an apocalyptic number.

12626539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12626539 is an equidigital number, since it uses as much as digits as its factorization.

12626539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 12626539 is about 3553.3841616127. The cubic root of 12626539 is about 232.8599365736.

The spelling of 12626539 in words is "twelve million, six hundred twenty-six thousand, five hundred thirty-nine".