1681112 has 8 divisors (see below), whose sum is σ = 3152100. Its totient is φ = 840552.

The previous prime is 1681103. The next prime is 1681129. The reversal of 1681112 is 2111861.

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

It is a super-2 number, since 2×1681112² = 5652275113088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 105062 + ... + 105077.

2^1681112 is an apocalyptic number.

It is an amenable number.

1681112 is a deficient number, since it is larger than the sum of its proper divisors (1470988).

1681112 is a wasteful number, since it uses less digits than its factorization.

1681112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210145 (or 210141 counting only the distinct ones).

The product of its digits is 96, while the sum is 20.

The square root of 1681112 is about 1296.5770320347. The cubic root of 1681112 is about 118.9046620054.

Adding to 1681112 its reverse (2111861), we get a palindrome (3792973).

The spelling of 1681112 in words is "one million, six hundred eighty-one thousand, one hundred twelve".