1000256 has 14 divisors (see below), whose sum is σ = 1985010. Its totient is φ = 500096.

The previous prime is 1000253. The next prime is 1000273. The reversal of 1000256 is 6520001.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 256 = 1000^2 + 16^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1000256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7751 + ... + 7878.

2^1000256 is an apocalyptic number.

1000256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1000256 is a deficient number, since it is larger than the sum of its proper divisors (984754).

1000256 is an equidigital number, since it uses as much as digits as its factorization.

1000256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15641 (or 15631 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1000256 is about 1000.1279918090. The cubic root of 1000256 is about 100.0085326053.

Adding to 1000256 its reverse (6520001), we get a palindrome (7520257).

The spelling of 1000256 in words is "one million, two hundred fifty-six", and thus it is an aban number.