135240142441 has 4 divisors (see below), whose sum is σ = 135275300992. Its totient is φ = 135204983892.

The previous prime is 135240142399. The next prime is 135240142459. The reversal of 135240142441 is 144241042531.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144241042531 = 337 ⋅428014963.

It is a cyclic number.

It is not a de Polignac number, because 135240142441 - 2¹⁹ = 135239618153 is a prime.

It is a super-2 number, since 2×135240142441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135240148441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17573505 + ... + 17581198.

It is an arithmetic number, because the mean of its divisors is an integer number (33818825248).

Almost surely, 2^135240142441 is an apocalyptic number.

It is an amenable number.

135240142441 is a deficient number, since it is larger than the sum of its proper divisors (35158551).

135240142441 is an equidigital number, since it uses as much as digits as its factorization.

135240142441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35158550.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 135240142441 its reverse (144241042531), we get a palindrome (279481184972).

The spelling of 135240142441 in words is "one hundred thirty-five billion, two hundred forty million, one hundred forty-two thousand, four hundred forty-one".