12643503 has 8 divisors (see below), whose sum is σ = 17109888. Its totient is φ = 8303064.

The previous prime is 12643489. The next prime is 12643511. The reversal of 12643503 is 30534621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12643503 - 2⁴ = 12643487 is a prime.

It is a super-2 number, since 2×12643503² = 319716336222018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643513) 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 7 ways as a sum of consecutive naturals, for example, 31251 + ... + 31652.

It is an arithmetic number, because the mean of its divisors is an integer number (2138736).

Almost surely, 2^12643503 is an apocalyptic number.

12643503 is a deficient number, since it is larger than the sum of its proper divisors (4466385).

12643503 is an equidigital number, since it uses as much as digits as its factorization.

12643503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62973.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 12643503 is about 3555.7703806630. The cubic root of 12643503 is about 232.9641738527.

The spelling of 12643503 in words is "twelve million, six hundred forty-three thousand, five hundred three".