12591149 has 2 divisors, whose sum is σ = 12591150. Its totient is φ = 12591148.

The previous prime is 12591043. The next prime is 12591151. The reversal of 12591149 is 94119521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 515524 = 3475^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 12591149 - 2¹² = 12587053 is a prime.

Together with 12591151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12591199) 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, 6295574 + 6295575.

It is an arithmetic number, because the mean of its divisors is an integer number (6295575).

Almost surely, 2^12591149 is an apocalyptic number.

It is an amenable number.

12591149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12591149 is an equidigital number, since it uses as much as digits as its factorization.

12591149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 32.

The square root of 12591149 is about 3548.4009074511. The cubic root of 12591149 is about 232.6421776546.

The spelling of 12591149 in words is "twelve million, five hundred ninety-one thousand, one hundred forty-nine".