12557555 has 8 divisors (see below), whose sum is σ = 15353712. Its totient is φ = 9856288.

The previous prime is 12557549. The next prime is 12557561. The reversal of 12557555 is 55575521.

It is an interprime number because it is at equal distance from previous prime (12557549) and next prime (12557561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12557555 - 2⁶ = 12557491 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23429 + ... + 23958.

It is an arithmetic number, because the mean of its divisors is an integer number (1919214).

Almost surely, 2^12557555 is an apocalyptic number.

12557555 is a deficient number, since it is larger than the sum of its proper divisors (2796157).

12557555 is an equidigital number, since it uses as much as digits as its factorization.

12557555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47445.

The product of its digits is 43750, while the sum is 35.

The square root of 12557555 is about 3543.6640642138. The cubic root of 12557555 is about 232.4350919130.

The spelling of 12557555 in words is "twelve million, five hundred fifty-seven thousand, five hundred fifty-five".