12115543 has 16 divisors (see below), whose sum is σ = 14217984. Its totient is φ = 10200960.

The previous prime is 12115531. The next prime is 12115547. The reversal of 12115543 is 34551121.

It is a happy number.

It is not a de Polignac number, because 12115543 - 2⁹ = 12115031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115547) 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, 12046 + ... + 13012.

It is an arithmetic number, because the mean of its divisors is an integer number (888624).

Almost surely, 2^12115543 is an apocalyptic number.

12115543 is a deficient number, since it is larger than the sum of its proper divisors (2102441).

12115543 is a wasteful number, since it uses less digits than its factorization.

12115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its digits is 600, while the sum is 22.

The square root of 12115543 is about 3480.7388583460. The cubic root of 12115543 is about 229.6753011214.

Adding to 12115543 its reverse (34551121), we get a palindrome (46666664).

The spelling of 12115543 in words is "twelve million, one hundred fifteen thousand, five hundred forty-three".