12144520 has 16 divisors (see below), whose sum is σ = 27325260. Its totient is φ = 4857792.

The previous prime is 12144493. The next prime is 12144521. The reversal of 12144520 is 2544121.

12144520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11737476 + 407044 = 3426^2 + 638^2 .

It is not an unprimeable number, because it can be changed into a prime (12144521) 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, 151767 + ... + 151846.

Almost surely, 2^12144520 is an apocalyptic number.

12144520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12144520 is an abundant number, since it is smaller than the sum of its proper divisors (15180740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12144520 is a wasteful number, since it uses less digits than its factorization.

12144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303624 (or 303620 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12144520 is about 3484.8988507559. The cubic root of 12144520 is about 229.8582617576.

Adding to 12144520 its reverse (2544121), we get a palindrome (14688641).

The spelling of 12144520 in words is "twelve million, one hundred forty-four thousand, five hundred twenty".