12115641 has 16 divisors (see below), whose sum is σ = 17179776. Its totient is φ = 7577856.

The previous prime is 12115639. The next prime is 12115651. The reversal of 12115641 is 14651121.

It is not a de Polignac number, because 12115641 - 2¹ = 12115639 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12115601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (1073736).

Almost surely, 2^12115641 is an apocalyptic number.

It is an amenable number.

12115641 is a deficient number, since it is larger than the sum of its proper divisors (5064135).

12115641 is a wasteful number, since it uses less digits than its factorization.

12115641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392.

The product of its digits is 240, while the sum is 21.

The square root of 12115641 is about 3480.7529357885. The cubic root of 12115641 is about 229.6759203843.

Adding to 12115641 its reverse (14651121), we get a palindrome (26766762).

The spelling of 12115641 in words is "twelve million, one hundred fifteen thousand, six hundred forty-one".