135315241 has 2 divisors, whose sum is σ = 135315242. Its totient is φ = 135315240.

The previous prime is 135315239. The next prime is 135315251. The reversal of 135315241 is 142513531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81072016 + 54243225 = 9004^2 + 7365^2 .

It is an emirp because it is prime and its reverse (142513531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135315241 - 2¹ = 135315239 is a prime.

Together with 135315239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135315251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67657620 + 67657621.

It is an arithmetic number, because the mean of its divisors is an integer number (67657621).

Almost surely, 2^135315241 is an apocalyptic number.

It is an amenable number.

135315241 is a deficient number, since it is larger than the sum of its proper divisors (1).

135315241 is an equidigital number, since it uses as much as digits as its factorization.

135315241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 135315241 is about 11632.5079411105. The cubic root of 135315241 is about 513.3917732515.

Adding to 135315241 its reverse (142513531), we get a palindrome (277828772).

The spelling of 135315241 in words is "one hundred thirty-five million, three hundred fifteen thousand, two hundred forty-one".