173161 has 4 divisors (see below), whose sum is σ = 177232. Its totient is φ = 169092.

The previous prime is 173149. The next prime is 173177. The reversal of 173161 is 161371.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161371 = 7 ⋅23053.

It is a cyclic number.

It is not a de Polignac number, because 173161 - 2⁹ = 172649 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971 + ... + 2056.

It is an arithmetic number, because the mean of its divisors is an integer number (44308).

2¹⁷³¹⁶¹ is an apocalyptic number.

It is an amenable number.

173161 is a deficient number, since it is larger than the sum of its proper divisors (4071).

173161 is an equidigital number, since it uses as much as digits as its factorization.

173161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070.

The product of its digits is 126, while the sum is 19.

The square root of 173161 is about 416.1261827859. The cubic root of 173161 is about 55.7378263753.

The spelling of 173161 in words is "one hundred seventy-three thousand, one hundred sixty-one".