1681706 has 16 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 764400.

The previous prime is 1681703. The next prime is 1681711. The reversal of 1681706 is 6071861.

It is not an unprimeable number, because it can be changed into a prime (1681703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (172368).

2^1681706 is an apocalyptic number.

1681706 is a deficient number, since it is larger than the sum of its proper divisors (1076182).

1681706 is a wasteful number, since it uses less digits than its factorization.

1681706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1681706 is about 1296.8060764818. The cubic root of 1681706 is about 118.9186648504.

The spelling of 1681706 in words is "one million, six hundred eighty-one thousand, seven hundred six".