12117643 has 8 divisors (see below), whose sum is σ = 12305520. Its totient is φ = 11931360.

The previous prime is 12117607. The next prime is 12117659. The reversal of 12117643 is 34671121.

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 12117643 - 2¹⁷ = 11986571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12117043) 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, 28573 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (1538190).

Almost surely, 2^12117643 is an apocalyptic number.

12117643 is a deficient number, since it is larger than the sum of its proper divisors (187877).

12117643 is a wasteful number, since it uses less digits than its factorization.

12117643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its digits is 1008, while the sum is 25.

The square root of 12117643 is about 3481.0405053662. The cubic root of 12117643 is about 229.6885703099.

Adding to 12117643 its reverse (34671121), we get a palindrome (46788764).

The spelling of 12117643 in words is "twelve million, one hundred seventeen thousand, six hundred forty-three".