12040520 has 16 divisors (see below), whose sum is σ = 27091260. Its totient is φ = 4816192.

The previous prime is 12040517. The next prime is 12040529. The reversal of 12040520 is 2504021.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 521284 = 3394^2 + 722^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12040495 and 12040504.

It is not an unprimeable number, because it can be changed into a prime (12040529) 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 3 ways as a sum of consecutive naturals, for example, 150467 + ... + 150546.

Almost surely, 2^12040520 is an apocalyptic number.

12040520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040520 is an abundant number, since it is smaller than the sum of its proper divisors (15050740).

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

12040520 is a wasteful number, since it uses less digits than its factorization.

12040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301024 (or 301020 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12040520 is about 3469.9452445248. The cubic root of 12040520 is about 229.2002469065.

Adding to 12040520 its reverse (2504021), we get a palindrome (14544541).

The spelling of 12040520 in words is "twelve million, forty thousand, five hundred twenty".