135249 has 4 divisors (see below), whose sum is σ = 180336. Its totient is φ = 90164.

The previous prime is 135241. The next prime is 135257. The reversal of 135249 is 942531.

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.

It is an interprime number because it is at equal distance from previous prime (135241) and next prime (135257).

It is a cyclic number.

It is not a de Polignac number, because 135249 - 2³ = 135241 is a prime.

It is a D-number.

135249 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (135241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22539 + ... + 22544.

It is an arithmetic number, because the mean of its divisors is an integer number (45084).

2¹³⁵²⁴⁹ is an apocalyptic number.

It is an amenable number.

135249 is a deficient number, since it is larger than the sum of its proper divisors (45087).

135249 is an equidigital number, since it uses as much as digits as its factorization.

135249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45086.

The product of its digits is 1080, while the sum is 24.

The square root of 135249 is about 367.7621513968. The cubic root of 135249 is about 51.3307985855.

The spelling of 135249 in words is "one hundred thirty-five thousand, two hundred forty-nine".