135142252 has 24 divisors (see below), whose sum is σ = 274095360. Its totient is φ = 57101520.

The previous prime is 135142247. The next prime is 135142279. The reversal of 135142252 is 252241531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32002 + ... + 35977.

It is an arithmetic number, because the mean of its divisors is an integer number (11420640).

Almost surely, 2^135142252 is an apocalyptic number.

It is an amenable number.

135142252 is an abundant number, since it is smaller than the sum of its proper divisors (138953108).

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

135142252 is a wasteful number, since it uses less digits than its factorization.

135142252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68061 (or 68059 counting only the distinct ones).

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

The square root of 135142252 is about 11625.0699782840. The cubic root of 135142252 is about 513.1729040847.

Adding to 135142252 its reverse (252241531), we get a palindrome (387383783).

The spelling of 135142252 in words is "one hundred thirty-five million, one hundred forty-two thousand, two hundred fifty-two".