12856224 has 24 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 4285376.

The previous prime is 12856219. The next prime is 12856231. The reversal of 12856224 is 42265821.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 12856191 and 12856200.

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, 66864 + ... + 67055.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^12856224 is an apocalyptic number.

It is an amenable number.

12856224 is an abundant number, since it is smaller than the sum of its proper divisors (20891616).

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

12856224 is a wasteful number, since it uses less digits than its factorization.

12856224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133932 (or 133924 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 12856224 is about 3585.5576972069. The cubic root of 12856224 is about 234.2634187446.

The spelling of 12856224 in words is "twelve million, eight hundred fifty-six thousand, two hundred twenty-four".