135560881 has 2 divisors, whose sum is σ = 135560882. Its totient is φ = 135560880.

The previous prime is 135560879. The next prime is 135560891. The reversal of 135560881 is 188065531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 6170256 = 11375^2 + 2484^2 .

It is a cyclic number.

It is not a de Polignac number, because 135560881 - 2¹ = 135560879 is a prime.

It is a super-2 number, since 2×135560881² = 36753504914992322, which contains 22 as substring.

Together with 135560879, it forms a pair of twin primes.

It is equal to p_7675408 and since 135560881 and 7675408 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135560881.

It is not a weakly prime, because it can be changed into another prime (135560891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67780440 + 67780441.

It is an arithmetic number, because the mean of its divisors is an integer number (67780441).

Almost surely, 2^135560881 is an apocalyptic number.

It is an amenable number.

135560881 is a deficient number, since it is larger than the sum of its proper divisors (1).

135560881 is an equidigital number, since it uses as much as digits as its factorization.

135560881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 135560881 is about 11643.0614960156. The cubic root of 135560881 is about 513.7022416598.

The spelling of 135560881 in words is "one hundred thirty-five million, five hundred sixty thousand, eight hundred eighty-one".