12118641 has 4 divisors (see below), whose sum is σ = 16158192. Its totient is φ = 8079092.

The previous prime is 12118633. The next prime is 12118643. The reversal of 12118641 is 14681121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12118641 - 2³ = 12118633 is a prime.

It is a super-2 number, since 2×12118641² = 293722919373762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12118643) 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, 2019771 + ... + 2019776.

It is an arithmetic number, because the mean of its divisors is an integer number (4039548).

Almost surely, 2^12118641 is an apocalyptic number.

It is an amenable number.

12118641 is a deficient number, since it is larger than the sum of its proper divisors (4039551).

12118641 is an equidigital number, since it uses as much as digits as its factorization.

12118641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039550.

The product of its digits is 384, while the sum is 24.

The square root of 12118641 is about 3481.1838503590. The cubic root of 12118641 is about 229.6948757963.

Adding to 12118641 its reverse (14681121), we get a palindrome (26799762).

The spelling of 12118641 in words is "twelve million, one hundred eighteen thousand, six hundred forty-one".