12144021 has 16 divisors (see below), whose sum is σ = 17131200. Its totient is φ = 7630848.

The previous prime is 12144019. The next prime is 12144031. The reversal of 12144021 is 12044121.

It is not a de Polignac number, because 12144021 - 2¹ = 12144019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144031) 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 15 ways as a sum of consecutive naturals, for example, 14235 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (1070700).

Almost surely, 2^12144021 is an apocalyptic number.

It is an amenable number.

12144021 is a deficient number, since it is larger than the sum of its proper divisors (4987179).

12144021 is a wasteful number, since it uses less digits than its factorization.

12144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12144021 is about 3484.8272554031. The cubic root of 12144021 is about 229.8551135381.

Adding to 12144021 its reverse (12044121), we get a palindrome (24188142).

The spelling of 12144021 in words is "twelve million, one hundred forty-four thousand, twenty-one".