1081656 has 48 divisors (see below), whose sum is σ = 2981160. Its totient is φ = 354240.

The previous prime is 1081637. The next prime is 1081657. The reversal of 1081656 is 6561801.

1081656 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 656 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5886 + ... + 6066.

2^1081656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490580).

1081656 is an abundant number, since it is smaller than the sum of its proper divisors (1899504).

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

1081656 is a wasteful number, since it uses less digits than its factorization.

1081656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1081656 is about 1040.0269227284. The cubic root of 1081656 is about 102.6509692835.

It can be divided in two parts, 108 and 1656, that added together give a square (1764 = 42²).

The spelling of 1081656 in words is "one million, eighty-one thousand, six hundred fifty-six".