1606 has 8 divisors (see below), whose sum is σ = 2664. Its totient is φ = 720.

The previous prime is 1601. The next prime is 1607. The reversal of 1606 is 6061.

1606 = T₁₀ + T₁₁ + ... + T₂₁.

1606 is nontrivially palindromic in base 16.

1606 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

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

1606 is an undulating number in base 16.

It is a plaindrome in base 6.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15 + ... + 58.

It is an arithmetic number, because the mean of its divisors is an integer number (333).

1606 is a deficient number, since it is larger than the sum of its proper divisors (1058).

1606 is a wasteful number, since it uses less digits than its factorization.

1606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1606 is about 40.0749298190. The cubic root of 1606 is about 11.7106728044.

Adding to 1606 its reverse (6061), we get a palindrome (7667).

The spelling of 1606 in words is "one thousand, six hundred six".