1320256 has 42 divisors (see below), whose sum is σ = 3054858. Its totient is φ = 564480.

The previous prime is 1320251. The next prime is 1320287. The reversal of 1320256 is 6520231.

It is a happy number.

1320256 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 614656 = 840^2 + 784^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2926 + ... + 3346.

2^1320256 is an apocalyptic number.

1320256 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 1320256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527429).

1320256 is an abundant number, since it is smaller than the sum of its proper divisors (1734602).

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

1320256 is an equidigital number, since it uses as much as digits as its factorization.

1320256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1320256 is about 1149.0239336063. The cubic root of 1320256 is about 109.7032220573.

Adding to 1320256 its reverse (6520231), we get a palindrome (7840487).

The spelling of 1320256 in words is "one million, three hundred twenty thousand, two hundred fifty-six".