135212128 has 24 divisors (see below), whose sum is σ = 266875560. Its totient is φ = 67434240.

The previous prime is 135212107. The next prime is 135212131. The reversal of 135212128 is 821212531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7923 + ... + 18253.

It is an arithmetic number, because the mean of its divisors is an integer number (11119815).

Almost surely, 2^135212128 is an apocalyptic number.

It is an amenable number.

135212128 is a deficient number, since it is larger than the sum of its proper divisors (131663432).

135212128 is a wasteful number, since it uses less digits than its factorization.

135212128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750 (or 10742 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 135212128 is about 11628.0749911583. The cubic root of 135212128 is about 513.2613350794.

Adding to 135212128 its reverse (821212531), we get a palindrome (956424659).

The spelling of 135212128 in words is "one hundred thirty-five million, two hundred twelve thousand, one hundred twenty-eight".