161206 has 4 divisors (see below), whose sum is σ = 241812. Its totient is φ = 80602.

The previous prime is 161201. The next prime is 161221. The reversal of 161206 is 602161.

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

It is a self number, because there is not a number n which added to its sum of digits gives 161206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161201) by changing a digit.

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 as a sum of consecutive naturals, namely, 40300 + ... + 40303.

It is an arithmetic number, because the mean of its divisors is an integer number (60453).

2¹⁶¹²⁰⁶ is an apocalyptic number.

161206 is a deficient number, since it is larger than the sum of its proper divisors (80606).

161206 is an equidigital number, since it uses as much as digits as its factorization.

161206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80605.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 161206 is about 401.5046699604. The cubic root of 161206 is about 54.4244105413.

Adding to 161206 its reverse (602161), we get a palindrome (763367).

The spelling of 161206 in words is "one hundred sixty-one thousand, two hundred six".