12643499 has 4 divisors (see below), whose sum is σ = 13792920. Its totient is φ = 11494080.

The previous prime is 12643489. The next prime is 12643511. The reversal of 12643499 is 99434621.

12643499 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.

It is a cyclic number.

It is not a de Polignac number, because 12643499 - 2¹⁶ = 12577963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574694 + ... + 574715.

It is an arithmetic number, because the mean of its divisors is an integer number (3448230).

Almost surely, 2^12643499 is an apocalyptic number.

12643499 is a deficient number, since it is larger than the sum of its proper divisors (1149421).

12643499 is a wasteful number, since it uses less digits than its factorization.

12643499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149420.

The product of its digits is 46656, while the sum is 38.

The square root of 12643499 is about 3555.7698181969. The cubic root of 12643499 is about 232.9641492852.

The spelling of 12643499 in words is "twelve million, six hundred forty-three thousand, four hundred ninety-nine".