135215242 has 16 divisors (see below), whose sum is σ = 215027712. Its totient is φ = 63657360.

The previous prime is 135215239. The next prime is 135215261. The reversal of 135215242 is 242512531.

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 in 7 ways as a sum of consecutive naturals, for example, 27178 + ... + 31765.

It is an arithmetic number, because the mean of its divisors is an integer number (13439232).

Almost surely, 2^135215242 is an apocalyptic number.

135215242 is a deficient number, since it is larger than the sum of its proper divisors (79812470).

135215242 is a wasteful number, since it uses less digits than its factorization.

135215242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59013.

The product of its digits is 2400, while the sum is 25.

The square root of 135215242 is about 11628.2088904526. The cubic root of 135215242 is about 513.2652752672.

Adding to 135215242 its reverse (242512531), we get a palindrome (377727773).

The spelling of 135215242 in words is "one hundred thirty-five million, two hundred fifteen thousand, two hundred forty-two".