1002256 has 20 divisors (see below), whose sum is σ = 1995532. Its totient is φ = 487296.

The previous prime is 1002247. The next prime is 1002257. The reversal of 1002256 is 6522001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 336400 = 816^2 + 580^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255 + ... + 1438.

2^1002256 is an apocalyptic number.

1002256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1002256 is a deficient number, since it is larger than the sum of its proper divisors (993276).

1002256 is a wasteful number, since it uses less digits than its factorization.

1002256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1002256 is about 1001.1273645246. The cubic root of 1002256 is about 100.0751435204.

Adding to 1002256 its reverse (6522001), we get a palindrome (7524257).

The spelling of 1002256 in words is "one million, two thousand, two hundred fifty-six".