12397636 has 6 divisors (see below), whose sum is σ = 21695870. Its totient is φ = 6198816.

The previous prime is 12397597. The next prime is 12397639. The reversal of 12397636 is 63679321.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 1308736 = 3330^2 + 1144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12397595 and 12397604.

It is not an unprimeable number, because it can be changed into a prime (12397639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1549701 + ... + 1549708.

Almost surely, 2^12397636 is an apocalyptic number.

It is an amenable number.

12397636 is a deficient number, since it is larger than the sum of its proper divisors (9298234).

12397636 is a wasteful number, since it uses less digits than its factorization.

12397636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099413 (or 3099411 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 12397636 is about 3521.0276908880. The cubic root of 12397636 is about 231.4441956776. Note that the first 3 decimals are identical.

The spelling of 12397636 in words is "twelve million, three hundred ninety-seven thousand, six hundred thirty-six".