12409643 has 4 divisors (see below), whose sum is σ = 13139640. Its totient is φ = 11679648.

The previous prime is 12409637. The next prime is 12409667. The reversal of 12409643 is 34690421.

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 12409643 - 2⁸ = 12409387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12409613) 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, 364973 + ... + 365006.

It is an arithmetic number, because the mean of its divisors is an integer number (3284910).

Almost surely, 2^12409643 is an apocalyptic number.

12409643 is a deficient number, since it is larger than the sum of its proper divisors (729997).

12409643 is an equidigital number, since it uses as much as digits as its factorization.

12409643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729996.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 12409643 is about 3522.7323202310. The cubic root of 12409643 is about 231.5188887834.

The spelling of 12409643 in words is "twelve million, four hundred nine thousand, six hundred forty-three".