12005256671 has 8 divisors (see below), whose sum is σ = 12338788800. Its totient is φ = 11674978848.

The previous prime is 12005256619. The next prime is 12005256737. The reversal of 12005256671 is 17665250021.

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 12005256671 - 2⁶ = 12005256607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005256271) 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, 806096 + ... + 820853.

It is an arithmetic number, because the mean of its divisors is an integer number (1542348600).

Almost surely, 2^12005256671 is an apocalyptic number.

12005256671 is a deficient number, since it is larger than the sum of its proper divisors (333532129).

12005256671 is a wasteful number, since it uses less digits than its factorization.

12005256671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627153.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 12005256671 in words is "twelve billion, five million, two hundred fifty-six thousand, six hundred seventy-one".