135841243 has 4 divisors (see below), whose sum is σ = 141747408. Its totient is φ = 129935080.

The previous prime is 135841231. The next prime is 135841253. The reversal of 135841243 is 342148531.

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

It is a cyclic number.

It is not a de Polignac number, because 135841243 - 2¹³ = 135833051 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135841213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2953048 + ... + 2953093.

It is an arithmetic number, because the mean of its divisors is an integer number (35436852).

Almost surely, 2^135841243 is an apocalyptic number.

135841243 is a deficient number, since it is larger than the sum of its proper divisors (5906165).

135841243 is an equidigital number, since it uses as much as digits as its factorization.

135841243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906164.

The product of its digits is 11520, while the sum is 31.

The square root of 135841243 is about 11655.0951519067. The cubic root of 135841243 is about 514.0561377920.

Adding to 135841243 its reverse (342148531), we get a palindrome (477989774).

The spelling of 135841243 in words is "one hundred thirty-five million, eight hundred forty-one thousand, two hundred forty-three".