135288581 has 2 divisors, whose sum is σ = 135288582. Its totient is φ = 135288580.

The previous prime is 135288577. The next prime is 135288623. The reversal of 135288581 is 185882531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120780100 + 14508481 = 10990^2 + 3809^2 .

It is a cyclic number.

It is not a de Polignac number, because 135288581 - 2² = 135288577 is a prime.

It is a super-2 number, since 2×135288581² = 36606000297987122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135288521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67644290 + 67644291.

It is an arithmetic number, because the mean of its divisors is an integer number (67644291).

Almost surely, 2^135288581 is an apocalyptic number.

It is an amenable number.

135288581 is a deficient number, since it is larger than the sum of its proper divisors (1).

135288581 is an equidigital number, since it uses as much as digits as its factorization.

135288581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 41.

The square root of 135288581 is about 11631.3619580856. The cubic root of 135288581 is about 513.3580546461.

The spelling of 135288581 in words is "one hundred thirty-five million, two hundred eighty-eight thousand, five hundred eighty-one".