12285520 has 40 divisors (see below), whose sum is σ = 30763656. Its totient is φ = 4535808.

The previous prime is 12285503. The next prime is 12285521. The reversal of 12285520 is 2558221.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 12222016 = 252^2 + 3496^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12285521) 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, 4867 + ... + 6946.

Almost surely, 2^12285520 is an apocalyptic number.

12285520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12285520 is an abundant number, since it is smaller than the sum of its proper divisors (18478136).

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

12285520 is a wasteful number, since it uses less digits than its factorization.

12285520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11839 (or 11833 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 12285520 is about 3505.0706126981. The cubic root of 12285520 is about 230.7444059906.

The spelling of 12285520 in words is "twelve million, two hundred eighty-five thousand, five hundred twenty".