42540135305 has 4 divisors (see below), whose sum is σ = 51048162372. Its totient is φ = 34032108240.

The previous prime is 42540135269. The next prime is 42540135343. The reversal of 42540135305 is 50353104524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24307304464 + 18232830841 = 155908^2 + 135029^2 .

It is not a de Polignac number, because 42540135305 - 2⁶ = 42540135241 is a prime.

It is a super-2 number, since 2×42540135305² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254013526 + ... + 4254013535.

It is an arithmetic number, because the mean of its divisors is an integer number (12762040593).

Almost surely, 2^42540135305 is an apocalyptic number.

It is an amenable number.

42540135305 is a deficient number, since it is larger than the sum of its proper divisors (8508027067).

42540135305 is an equidigital number, since it uses as much as digits as its factorization.

42540135305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508027066.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 42540135305 its reverse (50353104524), we get a palindrome (92893239829).

The spelling of 42540135305 in words is "forty-two billion, five hundred forty million, one hundred thirty-five thousand, three hundred five".