198045 has 24 divisors (see below), whose sum is σ = 358176. Its totient is φ = 104976.

The previous prime is 198043. The next prime is 198047. The reversal of 198045 is 540891.

198045 = T₁₉₄ + T₁₉₅ + ... + T₂₀₃.

198045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198043) and next prime (198047).

It is not a de Polignac number, because 198045 - 2¹ = 198043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1134 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (14924).

2¹⁹⁸⁰⁴⁵ is an apocalyptic number.

198045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198045 is a deficient number, since it is larger than the sum of its proper divisors (160131).

198045 is an equidigital number, since it uses as much as digits as its factorization.

198045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 198045 is about 445.0224713427. The cubic root of 198045 is about 58.2891820107.

It can be divided in two parts, 1980 and 45, that added together give a square (2025 = 45²).

The spelling of 198045 in words is "one hundred ninety-eight thousand, forty-five".