1002856 has 16 divisors (see below), whose sum is σ = 1909440. Its totient is φ = 493680.

The previous prime is 1002853. The next prime is 1002857. The reversal of 1002856 is 6582001.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1002851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (119340).

2^1002856 is an apocalyptic number.

It is an amenable number.

1002856 is a deficient number, since it is larger than the sum of its proper divisors (906584).

1002856 is a wasteful number, since it uses less digits than its factorization.

1002856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 1940 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1002856 is about 1001.4269818614. The cubic root of 1002856 is about 100.0951095131.

Adding to 1002856 its reverse (6582001), we get a palindrome (7584857).

The spelling of 1002856 in words is "one million, two thousand, eight hundred fifty-six".