12109643 has 8 divisors (see below), whose sum is σ = 14904288. Its totient is φ = 9581184.

The previous prime is 12109633. The next prime is 12109649. The reversal of 12109643 is 34690121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12109643 - 2⁶ = 12109579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12109649) 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 7 ways as a sum of consecutive naturals, for example, 66446 + ... + 66627.

It is an arithmetic number, because the mean of its divisors is an integer number (1863036).

Almost surely, 2^12109643 is an apocalyptic number.

12109643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12109643 is a deficient number, since it is larger than the sum of its proper divisors (2794645).

12109643 is a wasteful number, since it uses less digits than its factorization.

12109643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133093.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 12109643 is about 3479.8912339325. The cubic root of 12109643 is about 229.6380128133.

Adding to 12109643 its reverse (34690121), we get a palindrome (46799764).

The spelling of 12109643 in words is "twelve million, one hundred nine thousand, six hundred forty-three".