12115443 has 4 divisors (see below), whose sum is σ = 16153928. Its totient is φ = 8076960.

The previous prime is 12115421. The next prime is 12115463. The reversal of 12115443 is 34451121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34451121 = 3 ⋅11483707.

It is a de Polignac number, because none of the positive numbers 2^k-12115443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12115463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019238 + ... + 2019243.

It is an arithmetic number, because the mean of its divisors is an integer number (4038482).

Almost surely, 2^12115443 is an apocalyptic number.

12115443 is a deficient number, since it is larger than the sum of its proper divisors (4038485).

12115443 is an equidigital number, since it uses as much as digits as its factorization.

12115443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038484.

The product of its digits is 480, while the sum is 21.

The square root of 12115443 is about 3480.7244935502. The cubic root of 12115443 is about 229.6746692171.

Adding to 12115443 its reverse (34451121), we get a palindrome (46566564).

The spelling of 12115443 in words is "twelve million, one hundred fifteen thousand, four hundred forty-three".