12331665 has 24 divisors (see below), whose sum is σ = 22501440. Its totient is φ = 6230304.

The previous prime is 12331661. The next prime is 12331667. The reversal of 12331665 is 56613321.

It is not a de Polignac number, because 12331665 - 2² = 12331661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12331661) 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 in 23 ways as a sum of consecutive naturals, for example, 6357 + ... + 8066.

It is an arithmetic number, because the mean of its divisors is an integer number (937560).

Almost surely, 2^12331665 is an apocalyptic number.

12331665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12331665 is a deficient number, since it is larger than the sum of its proper divisors (10169775).

12331665 is a wasteful number, since it uses less digits than its factorization.

12331665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14453 (or 14450 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 12331665 is about 3511.6470494627. The cubic root of 12331665 is about 231.0329407120.

Adding to 12331665 its reverse (56613321), we get a palindrome (68944986).

It can be divided in two parts, 12331 and 665, that added together give a square (12996 = 114²).

The spelling of 12331665 in words is "twelve million, three hundred thirty-one thousand, six hundred sixty-five".