161922 has 8 divisors (see below), whose sum is σ = 323856. Its totient is φ = 53972.

The previous prime is 161921. The next prime is 161923. The reversal of 161922 is 229161.

It is an interprime number because it is at equal distance from previous prime (161921) and next prime (161923).

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

161922 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (161921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13488 + ... + 13499.

It is an arithmetic number, because the mean of its divisors is an integer number (40482).

2¹⁶¹⁹²² is an apocalyptic number.

161922 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.

161922 is a wasteful number, since it uses less digits than its factorization.

161922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26992.

The product of its digits is 216, while the sum is 21.

The square root of 161922 is about 402.3953280047. The cubic root of 161922 is about 54.5048672813.

The spelling of 161922 in words is "one hundred sixty-one thousand, nine hundred twenty-two".