161706 has 8 divisors (see below), whose sum is σ = 323424. Its totient is φ = 53900.

The previous prime is 161683. The next prime is 161717. The reversal of 161706 is 607161.

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

161706 is an admirable number.

It is a super-2 number, since 2×161706² = 52297660872, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 16.

It is an unprimeable number.

161706 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 13470 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (40428).

2¹⁶¹⁷⁰⁶ is an apocalyptic number.

161706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161706 is a wasteful number, since it uses less digits than its factorization.

161706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26956.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 161706 is about 402.1268456594. The cubic root of 161706 is about 54.4806204418.

Adding to 161706 its reverse (607161), we get a palindrome (768867).

It can be divided in two parts, 16170 and 6, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 161706 in words is "one hundred sixty-one thousand, seven hundred six".