135420445 has 8 divisors (see below), whose sum is σ = 162782136. Its totient is φ = 108151296.

The previous prime is 135420413. The next prime is 135420449. The reversal of 135420445 is 544024531.

It can be written as a sum of positive squares in 4 ways, for example, as 49042009 + 86378436 = 7003^2 + 9294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135420445 - 2⁵ = 135420413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135420449) 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 7 ways as a sum of consecutive naturals, for example, 19872 + ... + 25801.

It is an arithmetic number, because the mean of its divisors is an integer number (20347767).

Almost surely, 2^135420445 is an apocalyptic number.

It is an amenable number.

135420445 is a deficient number, since it is larger than the sum of its proper divisors (27361691).

135420445 is an equidigital number, since it uses as much as digits as its factorization.

135420445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46271.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 135420445 is about 11637.0290452503. The cubic root of 135420445 is about 513.5247882675.

Adding to 135420445 its reverse (544024531), we get a palindrome (679444976).

The spelling of 135420445 in words is "one hundred thirty-five million, four hundred twenty thousand, four hundred forty-five".