135431242 has 8 divisors (see below), whose sum is σ = 203197536. Its totient is φ = 67698732.

The previous prime is 135431239. The next prime is 135431249. The reversal of 135431242 is 242134531.

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

It is not an unprimeable number, because it can be changed into a prime (135431249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7923 + ... + 18265.

It is an arithmetic number, because the mean of its divisors is an integer number (25399692).

Almost surely, 2^135431242 is an apocalyptic number.

135431242 is a deficient number, since it is larger than the sum of its proper divisors (67766294).

135431242 is a wasteful number, since it uses less digits than its factorization.

135431242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16892.

The product of its digits is 2880, while the sum is 25.

The square root of 135431242 is about 11637.4929430698. The cubic root of 135431242 is about 513.5384355908.

Adding to 135431242 its reverse (242134531), we get a palindrome (377565773).

The spelling of 135431242 in words is "one hundred thirty-five million, four hundred thirty-one thousand, two hundred forty-two".