12555645 has 8 divisors (see below), whose sum is σ = 20089056. Its totient is φ = 6696336.

The previous prime is 12555643. The next prime is 12555649. The reversal of 12555645 is 54655521.

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

It is not a de Polignac number, because 12555645 - 2¹ = 12555643 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555643) by changing a digit.

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, 418507 + ... + 418536.

It is an arithmetic number, because the mean of its divisors is an integer number (2511132).

Almost surely, 2^12555645 is an apocalyptic number.

12555645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12555645 is a deficient number, since it is larger than the sum of its proper divisors (7533411).

12555645 is an equidigital number, since it uses as much as digits as its factorization.

12555645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837051.

The product of its digits is 30000, while the sum is 33.

The square root of 12555645 is about 3543.3945588941. The cubic root of 12555645 is about 232.4233068817.

The spelling of 12555645 in words is "twelve million, five hundred fifty-five thousand, six hundred forty-five".