12154144 has 12 divisors (see below), whose sum is σ = 23928534. Its totient is φ = 6077056.

The previous prime is 12154127. The next prime is 12154147. The reversal of 12154144 is 44145121.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 5702544 = 2540^2 + 2388^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12154147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189877 + ... + 189940.

Almost surely, 2^12154144 is an apocalyptic number.

It is an amenable number.

12154144 is a deficient number, since it is larger than the sum of its proper divisors (11774390).

12154144 is an equidigital number, since it uses as much as digits as its factorization.

12154144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379827 (or 379819 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 12154144 is about 3486.2793921314. The cubic root of 12154144 is about 229.9189632598.

Adding to 12154144 its reverse (44145121), we get a palindrome (56299265).

The spelling of 12154144 in words is "twelve million, one hundred fifty-four thousand, one hundred forty-four".