12643502 has 4 divisors (see below), whose sum is σ = 18965256. Its totient is φ = 6321750.

The previous prime is 12643489. The next prime is 12643511. The reversal of 12643502 is 20534621.

12643502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20534621 = 193 ⋅106397.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160874 + ... + 3160877.

It is an arithmetic number, because the mean of its divisors is an integer number (4741314).

Almost surely, 2^12643502 is an apocalyptic number.

12643502 is a deficient number, since it is larger than the sum of its proper divisors (6321754).

12643502 is an equidigital number, since it uses as much as digits as its factorization.

12643502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321753.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 12643502 is about 3555.7702400465. The cubic root of 12643502 is about 232.9641677108.

The spelling of 12643502 in words is "twelve million, six hundred forty-three thousand, five hundred two".