12289271 has 8 divisors (see below), whose sum is σ = 12697344. Its totient is φ = 11886840.

The previous prime is 12289267. The next prime is 12289279. The reversal of 12289271 is 17298221.

It is a happy number.

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 12289271 - 2² = 12289267 is a prime.

It is a super-2 number, since 2×12289271² = 302052363422882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289279) 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, 3266 + ... + 5936.

It is an arithmetic number, because the mean of its divisors is an integer number (1587168).

Almost surely, 2^12289271 is an apocalyptic number.

12289271 is a deficient number, since it is larger than the sum of its proper divisors (408073).

12289271 is a wasteful number, since it uses less digits than its factorization.

12289271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its digits is 4032, while the sum is 32.

The square root of 12289271 is about 3505.6056538065. The cubic root of 12289271 is about 230.7678871346.

The spelling of 12289271 in words is "twelve million, two hundred eighty-nine thousand, two hundred seventy-one".