12989271 has 4 divisors (see below), whose sum is σ = 17319032. Its totient is φ = 8659512.

The previous prime is 12989269. The next prime is 12989281. The reversal of 12989271 is 17298921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12989271 - 2¹ = 12989269 is a prime.

It is a super-3 number, since 3×12989271³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989201) 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 3 ways as a sum of consecutive naturals, for example, 2164876 + ... + 2164881.

It is an arithmetic number, because the mean of its divisors is an integer number (4329758).

Almost surely, 2^12989271 is an apocalyptic number.

12989271 is a deficient number, since it is larger than the sum of its proper divisors (4329761).

12989271 is an equidigital number, since it uses as much as digits as its factorization.

12989271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329760.

The product of its digits is 18144, while the sum is 39.

The square root of 12989271 is about 3604.0631237535. The cubic root of 12989271 is about 235.0687651485.

The spelling of 12989271 in words is "twelve million, nine hundred eighty-nine thousand, two hundred seventy-one".