1681682 has 4 divisors (see below), whose sum is σ = 2522526. Its totient is φ = 840840.

The previous prime is 1681679. The next prime is 1681703. The reversal of 1681682 is 2861861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 491401 = 1091^2 + 701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420419 + ... + 420422.

2^1681682 is an apocalyptic number.

1681682 is a deficient number, since it is larger than the sum of its proper divisors (840844).

1681682 is an equidigital number, since it uses as much as digits as its factorization.

1681682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840843.

The product of its digits is 4608, while the sum is 32.

The square root of 1681682 is about 1296.7968229449. The cubic root of 1681682 is about 118.9180991428.

The spelling of 1681682 in words is "one million, six hundred eighty-one thousand, six hundred eighty-two".