135111243 has 4 divisors (see below), whose sum is σ = 180148328. Its totient is φ = 90074160.

The previous prime is 135111227. The next prime is 135111259. The reversal of 135111243 is 342111531.

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

It is an interprime number because it is at equal distance from previous prime (135111227) and next prime (135111259).

It is not a de Polignac number, because 135111243 - 2⁴ = 135111227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135111283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22518538 + ... + 22518543.

It is an arithmetic number, because the mean of its divisors is an integer number (45037082).

Almost surely, 2^135111243 is an apocalyptic number.

135111243 is a deficient number, since it is larger than the sum of its proper divisors (45037085).

135111243 is an equidigital number, since it uses as much as digits as its factorization.

135111243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45037084.

The product of its digits is 360, while the sum is 21.

The square root of 135111243 is about 11623.7361893670. The cubic root of 135111243 is about 513.1336511355.

Adding to 135111243 its reverse (342111531), we get a palindrome (477222774).

The spelling of 135111243 in words is "one hundred thirty-five million, one hundred eleven thousand, two hundred forty-three".