135238871 has 4 divisors (see below), whose sum is σ = 136303872. Its totient is φ = 134173872.

The previous prime is 135238853. The next prime is 135238877. The reversal of 135238871 is 178832531.

It is a happy number.

135238871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178832531 = 29 ⋅6166639.

It is a cyclic number.

It is not a de Polignac number, because 135238871 - 2¹⁸ = 134976727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135238877) 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, 532310 + ... + 532563.

It is an arithmetic number, because the mean of its divisors is an integer number (34075968).

Almost surely, 2^135238871 is an apocalyptic number.

135238871 is a deficient number, since it is larger than the sum of its proper divisors (1065001).

135238871 is a wasteful number, since it uses less digits than its factorization.

135238871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065000.

The product of its digits is 40320, while the sum is 38.

The square root of 135238871 is about 11629.2248666882. The cubic root of 135238871 is about 513.2951714008.

The spelling of 135238871 in words is "one hundred thirty-five million, two hundred thirty-eight thousand, eight hundred seventy-one".