12256171 has 12 divisors (see below), whose sum is σ = 13149936. Its totient is φ = 11401280.

The previous prime is 12256151. The next prime is 12256177. The reversal of 12256171 is 17165221.

It is not a de Polignac number, because 12256171 - 2¹⁹ = 11731883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12256177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38505 + ... + 38821.

It is an arithmetic number, because the mean of its divisors is an integer number (1095828).

Almost surely, 2^12256171 is an apocalyptic number.

12256171 is a deficient number, since it is larger than the sum of its proper divisors (893765).

12256171 is an equidigital number, since it uses as much as digits as its factorization.

12256171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 381 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 12256171 is about 3500.8814604325. The cubic root of 12256171 is about 230.5605169516.

It can be divided in two parts, 1225 and 6171, that added together give a square (7396 = 86²).

The spelling of 12256171 in words is "twelve million, two hundred fifty-six thousand, one hundred seventy-one".