12289871 has 8 divisors (see below), whose sum is σ = 13440000. Its totient is φ = 11145240.

The previous prime is 12289847. The next prime is 12289891. The reversal of 12289871 is 17898221.

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 12289871 - 2⁶ = 12289807 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 (12289801) 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, 4370 + ... + 6608.

It is an arithmetic number, because the mean of its divisors is an integer number (1680000).

Almost surely, 2^12289871 is an apocalyptic number.

12289871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12289871 is a deficient number, since it is larger than the sum of its proper divisors (1150129).

12289871 is a wasteful number, since it uses less digits than its factorization.

12289871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its digits is 16128, while the sum is 38.

The square root of 12289871 is about 3505.6912299859. The cubic root of 12289871 is about 230.7716426728.

The spelling of 12289871 in words is "twelve million, two hundred eighty-nine thousand, eight hundred seventy-one".