135504442 has 4 divisors (see below), whose sum is σ = 203256666. Its totient is φ = 67752220.

The previous prime is 135504407. The next prime is 135504451. The reversal of 135504442 is 244405531.

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

It can be written as a sum of positive squares in only one way, i.e., 70040161 + 65464281 = 8369^2 + 8091^2 .

It is a super-2 number, since 2×135504442² = 36722907603462728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135504442.

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 as a sum of consecutive naturals, namely, 33876109 + ... + 33876112.

Almost surely, 2^135504442 is an apocalyptic number.

135504442 is a deficient number, since it is larger than the sum of its proper divisors (67752224).

135504442 is an equidigital number, since it uses as much as digits as its factorization.

135504442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67752223.

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

The square root of 135504442 is about 11640.6375254966. The cubic root of 135504442 is about 513.6309406937.

Adding to 135504442 its reverse (244405531), we get a palindrome (379909973).

The spelling of 135504442 in words is "one hundred thirty-five million, five hundred four thousand, four hundred forty-two".