135240212 has 12 divisors (see below), whose sum is σ = 239014356. Its totient is φ = 66950400.

The previous prime is 135240199. The next prime is 135240221. The reversal of 135240212 is 212042531.

It can be written as a sum of positive squares in 2 ways, for example, as 126922756 + 8317456 = 11266^2 + 2884^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 166973 + ... + 167780.

It is an arithmetic number, because the mean of its divisors is an integer number (19917863).

Almost surely, 2^135240212 is an apocalyptic number.

It is an amenable number.

135240212 is a deficient number, since it is larger than the sum of its proper divisors (103774144).

135240212 is a wasteful number, since it uses less digits than its factorization.

135240212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334858 (or 334856 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 135240212 is about 11629.2825230106. The cubic root of 135240212 is about 513.2968679706.

Adding to 135240212 its reverse (212042531), we get a palindrome (347282743).

The spelling of 135240212 in words is "one hundred thirty-five million, two hundred forty thousand, two hundred twelve".