135420305 has 8 divisors (see below), whose sum is σ = 165168744. Its totient is φ = 106560000.

The previous prime is 135420269. The next prime is 135420319. The reversal of 135420305 is 503024531.

It can be written as a sum of positive squares in 4 ways, for example, as 1763584 + 133656721 = 1328^2 + 11561^2 .

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

It is not a de Polignac number, because 135420305 - 2¹² = 135416209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221696 + ... + 222305.

It is an arithmetic number, because the mean of its divisors is an integer number (20646093).

Almost surely, 2^135420305 is an apocalyptic number.

It is an amenable number.

135420305 is a deficient number, since it is larger than the sum of its proper divisors (29748439).

135420305 is an equidigital number, since it uses as much as digits as its factorization.

135420305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444067.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 135420305 is about 11637.0230299678. The cubic root of 135420305 is about 513.5246113038.

Adding to 135420305 its reverse (503024531), we get a palindrome (638444836).

The spelling of 135420305 in words is "one hundred thirty-five million, four hundred twenty thousand, three hundred five".