1002656 has 12 divisors (see below), whose sum is σ = 1974042. Its totient is φ = 501312.

The previous prime is 1002653. The next prime is 1002679. The reversal of 1002656 is 6562001.

It can be written as a sum of positive squares in only one way, i.e., 512656 + 490000 = 716^2 + 700^2 .

It is not an unprimeable number, because it can be changed into a prime (1002653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15635 + ... + 15698.

2^1002656 is an apocalyptic number.

1002656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1002656 is a deficient number, since it is larger than the sum of its proper divisors (971386).

1002656 is an equidigital number, since it uses as much as digits as its factorization.

1002656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31343 (or 31335 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1002656 is about 1001.3271193771. The cubic root of 1002656 is about 100.0884550673.

Adding to 1002656 its reverse (6562001), we get a palindrome (7564657).

The spelling of 1002656 in words is "one million, two thousand, six hundred fifty-six".