12204520 has 16 divisors (see below), whose sum is σ = 27460260. Its totient is φ = 4881792.

The previous prime is 12204503. The next prime is 12204523. The reversal of 12204520 is 2540221.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 412164 = 3434^2 + 642^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12204494 and 12204503.

It is not an unprimeable number, because it can be changed into a prime (12204523) 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, 152517 + ... + 152596.

Almost surely, 2^12204520 is an apocalyptic number.

12204520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12204520 is an abundant number, since it is smaller than the sum of its proper divisors (15255740).

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

12204520 is a wasteful number, since it uses less digits than its factorization.

12204520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305124 (or 305120 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12204520 is about 3493.4968155131. The cubic root of 12204520 is about 230.2361783144.

Adding to 12204520 its reverse (2540221), we get a palindrome (14744741).

The spelling of 12204520 in words is "twelve million, two hundred four thousand, five hundred twenty".