12235666 has 4 divisors (see below), whose sum is σ = 18353502. Its totient is φ = 6117832.

The previous prime is 12235661. The next prime is 12235667. The reversal of 12235666 is 66653221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 229441 = 3465^2 + 479^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12235661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3058915 + ... + 3058918.

Almost surely, 2^12235666 is an apocalyptic number.

12235666 is a deficient number, since it is larger than the sum of its proper divisors (6117836).

12235666 is an equidigital number, since it uses as much as digits as its factorization.

12235666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117835.

The product of its digits is 12960, while the sum is 31.

The square root of 12235666 is about 3497.9516863445. The cubic root of 12235666 is about 230.4318665937.

Adding to 12235666 its reverse (66653221), we get a palindrome (78888887).

It can be divided in two parts, 1223 and 5666, that added together give a square (6889 = 83²).

The spelling of 12235666 in words is "twelve million, two hundred thirty-five thousand, six hundred sixty-six".