12544643 has 4 divisors (see below), whose sum is σ = 12621768. Its totient is φ = 12467520.

The previous prime is 12544621. The next prime is 12544663. The reversal of 12544643 is 34644521.

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 12544643 - 2⁸ = 12544387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12544603) 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, 38318 + ... + 38643.

It is an arithmetic number, because the mean of its divisors is an integer number (3155442).

Almost surely, 2^12544643 is an apocalyptic number.

12544643 is a deficient number, since it is larger than the sum of its proper divisors (77125).

12544643 is an equidigital number, since it uses as much as digits as its factorization.

12544643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77124.

The product of its digits is 11520, while the sum is 29.

The square root of 12544643 is about 3541.8417525350. The cubic root of 12544643 is about 232.3553993525.

The spelling of 12544643 in words is "twelve million, five hundred forty-four thousand, six hundred forty-three".