135418681 has 6 divisors (see below), whose sum is σ = 142921482. Its totient is φ = 128291040.

The previous prime is 135418669. The next prime is 135418727. The reversal of 135418681 is 186814531.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 30151081 = 10260^2 + 5491^2 .

It is not a de Polignac number, because 135418681 - 2⁵ = 135418649 is a prime.

It is a super-2 number, since 2×135418681² = 36676438327559522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135418681.

It is not an unprimeable number, because it can be changed into a prime (135418601) 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 in 5 ways as a sum of consecutive naturals, for example, 187200 + ... + 187921.

It is an arithmetic number, because the mean of its divisors is an integer number (23820247).

Almost surely, 2^135418681 is an apocalyptic number.

It is an amenable number.

135418681 is a deficient number, since it is larger than the sum of its proper divisors (7502801).

135418681 is an equidigital number, since it uses as much as digits as its factorization.

135418681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375159 (or 375140 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 135418681 is about 11636.9532524626. The cubic root of 135418681 is about 513.5225585164.

It can be divided in two parts, 13541 and 8681, that added together give a palindrome (22222).

The spelling of 135418681 in words is "one hundred thirty-five million, four hundred eighteen thousand, six hundred eighty-one".