12663146 has 4 divisors (see below), whose sum is σ = 18994722. Its totient is φ = 6331572.

The previous prime is 12663143. The next prime is 12663191. The reversal of 12663146 is 64136621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64136621 = 67 ⋅957263.

It can be written as a sum of positive squares in only one way, i.e., 7623121 + 5040025 = 2761^2 + 2245^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12663143) 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, 3165785 + ... + 3165788.

Almost surely, 2^12663146 is an apocalyptic number.

12663146 is a deficient number, since it is larger than the sum of its proper divisors (6331576).

12663146 is an equidigital number, since it uses as much as digits as its factorization.

12663146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331575.

The product of its digits is 5184, while the sum is 29.

The square root of 12663146 is about 3558.5314386696. The cubic root of 12663146 is about 233.0847561388.

Adding to 12663146 its reverse (64136621), we get a palindrome (76799767).

The spelling of 12663146 in words is "twelve million, six hundred sixty-three thousand, one hundred forty-six".