161198 has 4 divisors (see below), whose sum is σ = 241800. Its totient is φ = 80598.

The previous prime is 161167. The next prime is 161201. The reversal of 161198 is 891161.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 40298 + ... + 40301.

It is an arithmetic number, because the mean of its divisors is an integer number (60450).

2¹⁶¹¹⁹⁸ is an apocalyptic number.

161198 is a deficient number, since it is larger than the sum of its proper divisors (80602).

161198 is an equidigital number, since it uses as much as digits as its factorization.

161198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80601.

The product of its digits is 432, while the sum is 26.

The square root of 161198 is about 401.4947073126. The cubic root of 161198 is about 54.4235102388.

It can be divided in two parts, 161 and 198, that multiplied together give a triangular number (31878 = T₂₅₂).

The spelling of 161198 in words is "one hundred sixty-one thousand, one hundred ninety-eight".