12309536 has 12 divisors (see below), whose sum is σ = 24234462. Its totient is φ = 6154752.

The previous prime is 12309533. The next prime is 12309551. The reversal of 12309536 is 63590321.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 59536 = 3500^2 + 244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12309499 and 12309508.

It is not an unprimeable number, because it can be changed into a prime (12309533) 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, 192305 + ... + 192368.

Almost surely, 2^12309536 is an apocalyptic number.

12309536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12309536 is a deficient number, since it is larger than the sum of its proper divisors (11924926).

12309536 is an equidigital number, since it uses as much as digits as its factorization.

12309536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384683 (or 384675 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 12309536 is about 3508.4948339708. The cubic root of 12309536 is about 230.8946628418.

Adding to 12309536 its reverse (63590321), we get a palindrome (75899857).

The spelling of 12309536 in words is "twelve million, three hundred nine thousand, five hundred thirty-six".