12591493 has 2 divisors, whose sum is σ = 12591494. Its totient is φ = 12591492.

The previous prime is 12591479. The next prime is 12591497. The reversal of 12591493 is 39419521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6749604 + 5841889 = 2598^2 + 2417^2 .

It is an emirp because it is prime and its reverse (39419521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12591493 - 2¹⁷ = 12460421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12591497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6295746 + 6295747.

It is an arithmetic number, because the mean of its divisors is an integer number (6295747).

Almost surely, 2^12591493 is an apocalyptic number.

It is an amenable number.

12591493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12591493 is an equidigital number, since it uses as much as digits as its factorization.

12591493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 12591493 is about 3548.4493796587. The cubic root of 12591493 is about 232.6442962905.

The spelling of 12591493 in words is "twelve million, five hundred ninety-one thousand, four hundred ninety-three".