12281856 has 48 divisors (see below), whose sum is σ = 32760000. Its totient is φ = 4091904.

The previous prime is 12281831. The next prime is 12281881. The reversal of 12281856 is 65818221.

It is an interprime number because it is at equal distance from previous prime (12281831) and next prime (12281881).

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5145 + ... + 7143.

It is an arithmetic number, because the mean of its divisors is an integer number (682500).

Almost surely, 2^12281856 is an apocalyptic number.

12281856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16380000).

12281856 is an abundant number, since it is smaller than the sum of its proper divisors (20478144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12281856 is an equidigital number, since it uses as much as digits as its factorization.

12281856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024 (or 2004 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 12281856 is about 3504.5479023691. The cubic root of 12281856 is about 230.7214648489.

The spelling of 12281856 in words is "twelve million, two hundred eighty-one thousand, eight hundred fifty-six".