12555681 has 8 divisors (see below), whose sum is σ = 16767360. Its totient is φ = 8357232.

The previous prime is 12555679. The next prime is 12555703. The reversal of 12555681 is 18655521.

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

It is not a de Polignac number, because 12555681 - 2¹ = 12555679 is a prime.

It is a super-2 number, since 2×12555681² = 315290250747522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12555281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (2095920).

Almost surely, 2^12555681 is an apocalyptic number.

It is an amenable number.

12555681 is a deficient number, since it is larger than the sum of its proper divisors (4211679).

12555681 is an equidigital number, since it uses as much as digits as its factorization.

12555681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615.

The product of its digits is 12000, while the sum is 33.

The square root of 12555681 is about 3543.3996387650. The cubic root of 12555681 is about 232.4235290190.

The spelling of 12555681 in words is "twelve million, five hundred fifty-five thousand, six hundred eighty-one".