135198 has 48 divisors (see below), whose sum is σ = 355680. Its totient is φ = 36288.

The previous prime is 135197. The next prime is 135209. The reversal of 135198 is 891531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135193) 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, 3636 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (7410).

2¹³⁵¹⁹⁸ is an apocalyptic number.

135198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177840).

135198 is an abundant number, since it is smaller than the sum of its proper divisors (220482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135198 is a wasteful number, since it uses less digits than its factorization.

135198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 78 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 135198 is about 367.6928065655. The cubic root of 135198 is about 51.3243457963.

It can be divided in two parts, 135 and 198, that added together give a palindrome (333).

The spelling of 135198 in words is "one hundred thirty-five thousand, one hundred ninety-eight".