12036643 has 4 divisors (see below), whose sum is σ = 12067360. Its totient is φ = 12005928.

The previous prime is 12036641. The next prime is 12036691. The reversal of 12036643 is 34663021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34663021 = 167 ⋅207563.

It is a cyclic number.

It is not a de Polignac number, because 12036643 - 2¹ = 12036641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12036641) 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, 14763 + ... + 15556.

It is an arithmetic number, because the mean of its divisors is an integer number (3016840).

Almost surely, 2^12036643 is an apocalyptic number.

12036643 is a deficient number, since it is larger than the sum of its proper divisors (30717).

12036643 is an equidigital number, since it uses as much as digits as its factorization.

12036643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30716.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 12036643 is about 3469.3865451979. The cubic root of 12036643 is about 229.1756437402.

Adding to 12036643 its reverse (34663021), we get a palindrome (46699664).

It can be divided in two parts, 120366 and 43, that added together give a square (120409 = 347²).

The spelling of 12036643 in words is "twelve million, thirty-six thousand, six hundred forty-three".