135198561 has 8 divisors (see below), whose sum is σ = 180628000. Its totient is φ = 89950752.

The previous prime is 135198541. The next prime is 135198571. The reversal of 135198561 is 165891531.

135198561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 135198561 - 2⁵ = 135198529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135198541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43660 + ... + 46653.

It is an arithmetic number, because the mean of its divisors is an integer number (22578500).

Almost surely, 2^135198561 is an apocalyptic number.

It is an amenable number.

135198561 is a deficient number, since it is larger than the sum of its proper divisors (45429439).

135198561 is an equidigital number, since it uses as much as digits as its factorization.

135198561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90815.

The product of its digits is 32400, while the sum is 39.

The square root of 135198561 is about 11627.4916039531. The cubic root of 135198561 is about 513.2441678585.

The spelling of 135198561 in words is "one hundred thirty-five million, one hundred ninety-eight thousand, five hundred sixty-one".