12581317 has 4 divisors (see below), whose sum is σ = 14378656. Its totient is φ = 10783980.

The previous prime is 12581291. The next prime is 12581323. The reversal of 12581317 is 71318521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71318521 = 1187 ⋅60083.

It is a cyclic number.

It is not a de Polignac number, because 12581317 - 2²³ = 4192709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898659 + ... + 898672.

It is an arithmetic number, because the mean of its divisors is an integer number (3594664).

Almost surely, 2^12581317 is an apocalyptic number.

It is an amenable number.

12581317 is a deficient number, since it is larger than the sum of its proper divisors (1797339).

12581317 is an equidigital number, since it uses as much as digits as its factorization.

12581317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797338.

The product of its digits is 1680, while the sum is 28.

The square root of 12581317 is about 3547.0152241004. The cubic root of 12581317 is about 232.5816077649.

Adding to 12581317 its reverse (71318521), we get a palindrome (83899838).

The spelling of 12581317 in words is "twelve million, five hundred eighty-one thousand, three hundred seventeen".