12143445 has 8 divisors (see below), whose sum is σ = 19429536. Its totient is φ = 6476496.

The previous prime is 12143441. The next prime is 12143447. The reversal of 12143445 is 54434121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12143445 - 2² = 12143441 is a prime.

It is a super-3 number, since 3×12143445³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143441) 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, 404767 + ... + 404796.

It is an arithmetic number, because the mean of its divisors is an integer number (2428692).

Almost surely, 2^12143445 is an apocalyptic number.

12143445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12143445 is a deficient number, since it is larger than the sum of its proper divisors (7286091).

12143445 is an equidigital number, since it uses as much as digits as its factorization.

12143445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809571.

The product of its digits is 1920, while the sum is 24.

The square root of 12143445 is about 3484.7446104413. The cubic root of 12143445 is about 229.8514794140.

Adding to 12143445 its reverse (54434121), we get a palindrome (66577566).

The spelling of 12143445 in words is "twelve million, one hundred forty-three thousand, four hundred forty-five".