135305405 has 4 divisors (see below), whose sum is σ = 162366492. Its totient is φ = 108244320.

The previous prime is 135305399. The next prime is 135305437. The reversal of 135305405 is 504503531.

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 69322276 + 65983129 = 8326^2 + 8123^2 .

It is not a de Polignac number, because 135305405 - 2⁶ = 135305341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13530536 + ... + 13530545.

It is an arithmetic number, because the mean of its divisors is an integer number (40591623).

Almost surely, 2^135305405 is an apocalyptic number.

It is an amenable number.

135305405 is a deficient number, since it is larger than the sum of its proper divisors (27061087).

135305405 is an equidigital number, since it uses as much as digits as its factorization.

135305405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27061086.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 135305405 is about 11632.0851527145. The cubic root of 135305405 is about 513.3793335495.

Adding to 135305405 its reverse (504503531), we get a palindrome (639808936).

The spelling of 135305405 in words is "one hundred thirty-five million, three hundred five thousand, four hundred five".