12355520 has 28 divisors (see below), whose sum is σ = 29422344. Its totient is φ = 4942080.

The previous prime is 12355513. The next prime is 12355543. The reversal of 12355520 is 2555321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18986 + ... + 19625.

It is an arithmetic number, because the mean of its divisors is an integer number (1050798).

Almost surely, 2^12355520 is an apocalyptic number.

12355520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12355520 is an abundant number, since it is smaller than the sum of its proper divisors (17066824).

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

12355520 is an equidigital number, since it uses as much as digits as its factorization.

12355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38628 (or 38618 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 12355520 is about 3515.0419627652. The cubic root of 12355520 is about 231.1818187113.

The spelling of 12355520 in words is "twelve million, three hundred fifty-five thousand, five hundred twenty".