1022256 has 60 divisors (see below), whose sum is σ = 2966080. Its totient is φ = 328320.

The previous prime is 1022251. The next prime is 1022291. The reversal of 1022256 is 6522201.

1022256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1022251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4350 + ... + 4578.

2^1022256 is an apocalyptic number.

1022256 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 1022256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483040).

1022256 is an abundant number, since it is smaller than the sum of its proper divisors (1943824).

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

1022256 is a wasteful number, since it uses less digits than its factorization.

1022256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1022256 is about 1011.0667633742. The cubic root of 1022256 is about 100.7364300614.

Adding to 1022256 its reverse (6522201), we get a palindrome (7544457).

Subtracting 1022256 from its reverse (6522201), we obtain a palindrome (5499945).

The spelling of 1022256 in words is "one million, twenty-two thousand, two hundred fifty-six".