1081688 has 8 divisors (see below), whose sum is σ = 2028180. Its totient is φ = 540840.

The previous prime is 1081687. The next prime is 1081699. The reversal of 1081688 is 8861801.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67598 + ... + 67613.

2^1081688 is an apocalyptic number.

It is an amenable number.

1081688 is a deficient number, since it is larger than the sum of its proper divisors (946492).

1081688 is a wasteful number, since it uses less digits than its factorization.

1081688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135217 (or 135213 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 1081688 is about 1040.0423068318. The cubic root of 1081688 is about 102.6519815581.

The spelling of 1081688 in words is "one million, eighty-one thousand, six hundred eighty-eight".