135120252 has 12 divisors (see below), whose sum is σ = 315280616. Its totient is φ = 45040080.

The previous prime is 135120247. The next prime is 135120259. The reversal of 135120252 is 252021531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135120259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5629999 + ... + 5630022.

Almost surely, 2^135120252 is an apocalyptic number.

135120252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135120252 is an abundant number, since it is smaller than the sum of its proper divisors (180160364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135120252 is a wasteful number, since it uses less digits than its factorization.

135120252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11260028 (or 11260026 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 135120252 is about 11624.1237089081. The cubic root of 135120252 is about 513.1450558571.

Adding to 135120252 its reverse (252021531), we get a palindrome (387141783).

The spelling of 135120252 in words is "one hundred thirty-five million, one hundred twenty thousand, two hundred fifty-two".