12317645 has 4 divisors (see below), whose sum is σ = 14781180. Its totient is φ = 9854112.

The previous prime is 12317623. The next prime is 12317647. The reversal of 12317645 is 54671321.

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 8684809 + 3632836 = 2947^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 12317645 - 2¹² = 12313549 is a prime.

It is a super-3 number, since 3×12317645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12317647) 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, 1231760 + ... + 1231769.

It is an arithmetic number, because the mean of its divisors is an integer number (3695295).

Almost surely, 2^12317645 is an apocalyptic number.

It is an amenable number.

12317645 is a deficient number, since it is larger than the sum of its proper divisors (2463535).

12317645 is an equidigital number, since it uses as much as digits as its factorization.

12317645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463534.

The product of its digits is 5040, while the sum is 29.

The square root of 12317645 is about 3509.6502674768. The cubic root of 12317645 is about 230.9453529148.

Adding to 12317645 its reverse (54671321), we get a palindrome (66988966).

The spelling of 12317645 in words is "twelve million, three hundred seventeen thousand, six hundred forty-five".