12144321 has 12 divisors (see below), whose sum is σ = 20047872. Its totient is φ = 6939576.

The previous prime is 12144313. The next prime is 12144331. The reversal of 12144321 is 12344121.

12144321 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12144321 - 2³ = 12144313 is a prime.

12144321 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 12144294 and 12144303.

It is not an unprimeable number, because it can be changed into a prime (12144331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96321 + ... + 96446.

It is an arithmetic number, because the mean of its divisors is an integer number (1670656).

Almost surely, 2^12144321 is an apocalyptic number.

It is an amenable number.

12144321 is a deficient number, since it is larger than the sum of its proper divisors (7903551).

12144321 is a wasteful number, since it uses less digits than its factorization.

12144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192780 (or 192777 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 12144321 is about 3484.8702988777. The cubic root of 12144321 is about 229.8570062656.

Adding to 12144321 its reverse (12344121), we get a palindrome (24488442).

The spelling of 12144321 in words is "twelve million, one hundred forty-four thousand, three hundred twenty-one".