12257555 has 12 divisors (see below), whose sum is σ = 15204816. Its totient is φ = 9486000.

The previous prime is 12257549. The next prime is 12257563. The reversal of 12257555 is 55575221.

It is not a de Polignac number, because 12257555 - 2⁶ = 12257491 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 3530 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (1267068).

Almost surely, 2^12257555 is an apocalyptic number.

12257555 is a deficient number, since it is larger than the sum of its proper divisors (2947261).

12257555 is an equidigital number, since it uses as much as digits as its factorization.

12257555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618 (or 2587 counting only the distinct ones).

The product of its digits is 17500, while the sum is 32.

The square root of 12257555 is about 3501.0791193573. The cubic root of 12257555 is about 230.5691951308.

The spelling of 12257555 in words is "twelve million, two hundred fifty-seven thousand, five hundred fifty-five".