12591193 has 4 divisors (see below), whose sum is σ = 12797668. Its totient is φ = 12384720.

The previous prime is 12591151. The next prime is 12591197. The reversal of 12591193 is 39119521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1281424 + 11309769 = 1132^2 + 3363^2 .

It is a cyclic number.

It is not a de Polignac number, because 12591193 - 2¹⁷ = 12460121 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12591197) 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 in 3 ways as a sum of consecutive naturals, for example, 103146 + ... + 103267.

It is an arithmetic number, because the mean of its divisors is an integer number (3199417).

Almost surely, 2^12591193 is an apocalyptic number.

It is an amenable number.

12591193 is a deficient number, since it is larger than the sum of its proper divisors (206475).

12591193 is an equidigital number, since it uses as much as digits as its factorization.

12591193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206474.

The product of its digits is 2430, while the sum is 31.

The square root of 12591193 is about 3548.4071074216. The cubic root of 12591193 is about 232.6424486451.

The spelling of 12591193 in words is "twelve million, five hundred ninety-one thousand, one hundred ninety-three".