12289856 has 14 divisors (see below), whose sum is σ = 24387810. Its totient is φ = 6144896.

The previous prime is 12289847. The next prime is 12289891. The reversal of 12289856 is 65898221.

It can be written as a sum of positive squares in only one way, i.e., 8904256 + 3385600 = 2984^2 + 1840^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95951 + ... + 96078.

Almost surely, 2^12289856 is an apocalyptic number.

12289856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12289856 is a deficient number, since it is larger than the sum of its proper divisors (12097954).

12289856 is an equidigital number, since it uses as much as digits as its factorization.

12289856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192041 (or 192031 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 12289856 is about 3505.6890906069. The cubic root of 12289856 is about 230.7715487858.

The spelling of 12289856 in words is "twelve million, two hundred eighty-nine thousand, eight hundred fifty-six".