12003520 has 28 divisors (see below), whose sum is σ = 28584144. Its totient is φ = 4801280.

The previous prime is 12003457. The next prime is 12003527. The reversal of 12003520 is 2530021.

It is a self number, because there is not a number n which added to its sum of digits gives 12003520.

It is not an unprimeable number, because it can be changed into a prime (12003527) 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, 18436 + ... + 19075.

Almost surely, 2^12003520 is an apocalyptic number.

12003520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003520 is an abundant number, since it is smaller than the sum of its proper divisors (16580624).

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

12003520 is an equidigital number, since it uses as much as digits as its factorization.

12003520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37528 (or 37518 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 12003520 is about 3464.6096461218. The cubic root of 12003520 is about 228.9652318452.

Adding to 12003520 its reverse (2530021), we get a palindrome (14533541).

The spelling of 12003520 in words is "twelve million, three thousand, five hundred twenty".