12036520 has 32 divisors (see below), whose sum is σ = 27531720. Its totient is φ = 4734720.

The previous prime is 12036511. The next prime is 12036523. The reversal of 12036520 is 2563021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5098564 + 6937956 = 2258^2 + 2634^2 .

It is not an unprimeable number, because it can be changed into a prime (12036523) 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 7 ways as a sum of consecutive naturals, for example, 27 + ... + 4906.

Almost surely, 2^12036520 is an apocalyptic number.

12036520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12036520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13765860).

12036520 is an abundant number, since it is smaller than the sum of its proper divisors (15495200).

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

12036520 is a wasteful number, since it uses less digits than its factorization.

12036520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005 (or 5001 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12036520 is about 3469.3688186758. The cubic root of 12036520 is about 229.1748631045.

Adding to 12036520 its reverse (2563021), we get a palindrome (14599541).

The spelling of 12036520 in words is "twelve million, thirty-six thousand, five hundred twenty".