135420443 has 4 divisors (see below), whose sum is σ = 136618968. Its totient is φ = 134221920.

The previous prime is 135420413. The next prime is 135420449. The reversal of 135420443 is 344024531.

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

It is a cyclic number.

It is not a de Polignac number, because 135420443 - 2¹⁰ = 135419419 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 599093 + ... + 599318.

It is an arithmetic number, because the mean of its divisors is an integer number (34154742).

Almost surely, 2^135420443 is an apocalyptic number.

135420443 is a deficient number, since it is larger than the sum of its proper divisors (1198525).

135420443 is a wasteful number, since it uses less digits than its factorization.

135420443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198524.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 135420443 is about 11637.0289593178. The cubic root of 135420443 is about 513.5247857394.

Adding to 135420443 its reverse (344024531), we get a palindrome (479444974).

The spelling of 135420443 in words is "one hundred thirty-five million, four hundred twenty thousand, four hundred forty-three".