12400663 has 4 divisors (see below), whose sum is σ = 13528008. Its totient is φ = 11273320.

The previous prime is 12400643. The next prime is 12400669. The reversal of 12400663 is 36600421.

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

It is a cyclic number.

It is not a de Polignac number, because 12400663 - 2²¹ = 10303511 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400669) 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 in 3 ways as a sum of consecutive naturals, for example, 563656 + ... + 563677.

It is an arithmetic number, because the mean of its divisors is an integer number (3382002).

Almost surely, 2^12400663 is an apocalyptic number.

12400663 is a deficient number, since it is larger than the sum of its proper divisors (1127345).

12400663 is a wasteful number, since it uses less digits than its factorization.

12400663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127344.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 12400663 is about 3521.4575107475. The cubic root of 12400663 is about 231.4630305741.

The spelling of 12400663 in words is "twelve million, four hundred thousand, six hundred sixty-three".