135138106 has 4 divisors (see below), whose sum is σ = 202707162. Its totient is φ = 67569052.

The previous prime is 135138077. The next prime is 135138187. The reversal of 135138106 is 601831531.

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., 118613881 + 16524225 = 10891^2 + 4065^2 .

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, 33784525 + ... + 33784528.

Almost surely, 2^135138106 is an apocalyptic number.

135138106 is a deficient number, since it is larger than the sum of its proper divisors (67569056).

135138106 is an equidigital number, since it uses as much as digits as its factorization.

135138106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67569055.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 135138106 is about 11624.8916554091. The cubic root of 135138106 is about 513.1676561907.

Adding to 135138106 its reverse (601831531), we get a palindrome (736969637).

It can be divided in two parts, 135138 and 106, that multiplied together give a triangular number (14324628 = T₅₃₅₂).

The spelling of 135138106 in words is "one hundred thirty-five million, one hundred thirty-eight thousand, one hundred six".