1000656 has 30 divisors (see below), whose sum is σ = 2800850. Its totient is φ = 333504.

The previous prime is 1000651. The next prime is 1000667. The reversal of 1000656 is 6560001.

1000656 is a `hidden beast` number, since 10 + 0 + 0 + 656 = 666.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 32400 = 984^2 + 180^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000651) 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, 3331 + ... + 3618.

2^1000656 is an apocalyptic number.

1000656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1000656 is an abundant number, since it is smaller than the sum of its proper divisors (1800194).

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

1000656 is a wasteful number, since it uses less digits than its factorization.

1000656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6963 (or 6954 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1000656 is about 1000.3279462256. The cubic root of 1000656 is about 100.0218618869.

Adding to 1000656 its reverse (6560001), we get a palindrome (7560657).

The spelling of 1000656 in words is "one million, six hundred fifty-six", and thus it is an aban number.