1256224 has 24 divisors (see below), whose sum is σ = 2542428. Its totient is φ = 610560.

The previous prime is 1256209. The next prime is 1256231. The reversal of 1256224 is 4226521.

It can be written as a sum of positive squares in 2 ways, for example, as 1140624 + 115600 = 1068^2 + 340^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1256195 and 1256204.

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, 654 + ... + 1714.

2^1256224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271214).

1256224 is an abundant number, since it is smaller than the sum of its proper divisors (1286204).

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

1256224 is a wasteful number, since it uses less digits than its factorization.

1256224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1100 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 1256224 is about 1120.8139899198. The cubic root of 1256224 is about 107.9002279306.

The spelling of 1256224 in words is "one million, two hundred fifty-six thousand, two hundred twenty-four".