1681606 has 8 divisors (see below), whose sum is σ = 2670840. Its totient is φ = 791328.

The previous prime is 1681597. The next prime is 1681619. The reversal of 1681606 is 6061861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24696 + ... + 24763.

It is an arithmetic number, because the mean of its divisors is an integer number (333855).

2^1681606 is an apocalyptic number.

1681606 is a deficient number, since it is larger than the sum of its proper divisors (989234).

1681606 is a wasteful number, since it uses less digits than its factorization.

1681606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49478.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1681606 is about 1296.7675196426. The cubic root of 1681606 is about 118.9163076999.

The spelling of 1681606 in words is "one million, six hundred eighty-one thousand, six hundred six".