135521027 has 2 divisors, whose sum is σ = 135521028. Its totient is φ = 135521026.

The previous prime is 135521021. The next prime is 135521039. The reversal of 135521027 is 720125531.

It is a weak prime.

It is an emirp because it is prime and its reverse (720125531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135521027 - 2⁴ = 135521011 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 135520987 and 135521005.

It is not a weakly prime, because it can be changed into another prime (135521021) 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 as a sum of consecutive naturals, namely, 67760513 + 67760514.

It is an arithmetic number, because the mean of its divisors is an integer number (67760514).

Almost surely, 2^135521027 is an apocalyptic number.

135521027 is a deficient number, since it is larger than the sum of its proper divisors (1).

135521027 is an equidigital number, since it uses as much as digits as its factorization.

135521027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 135521027 is about 11641.3498787727. The cubic root of 135521027 is about 513.6518950415.

Adding to 135521027 its reverse (720125531), we get a palindrome (855646558).

The spelling of 135521027 in words is "one hundred thirty-five million, five hundred twenty-one thousand, twenty-seven".