12646418 has 4 divisors (see below), whose sum is σ = 18969630. Its totient is φ = 6323208.

The previous prime is 12646411. The next prime is 12646423. The reversal of 12646418 is 81464621.

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., 9966649 + 2679769 = 3157^2 + 1637^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12646411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161603 + ... + 3161606.

Almost surely, 2^12646418 is an apocalyptic number.

12646418 is a deficient number, since it is larger than the sum of its proper divisors (6323212).

12646418 is an equidigital number, since it uses as much as digits as its factorization.

12646418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323211.

The product of its digits is 9216, while the sum is 32.

The square root of 12646418 is about 3556.1802541491. The cubic root of 12646418 is about 232.9820760218.

The spelling of 12646418 in words is "twelve million, six hundred forty-six thousand, four hundred eighteen".