1256216 has 32 divisors (see below), whose sum is σ = 2600640. Its totient is φ = 565248.

The previous prime is 1256209. The next prime is 1256231. The reversal of 1256216 is 6126521.

It is a junction number, because it is equal to n+sod(n) for n = 1256191 and 1256200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4760 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (81270).

2^1256216 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 1256216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300320).

1256216 is an abundant number, since it is smaller than the sum of its proper divisors (1344424).

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

1256216 is a wasteful number, since it uses less digits than its factorization.

1256216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 319 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1256216 is about 1120.8104210793. The cubic root of 1256216 is about 107.8999988834.

The spelling of 1256216 in words is "one million, two hundred fifty-six thousand, two hundred sixteen".