135242540 has 12 divisors (see below), whose sum is σ = 284009376. Its totient is φ = 54097008.

The previous prime is 135242539. The next prime is 135242557. The reversal of 135242540 is 45242531.

It is a happy number.

135242540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 3381044 + ... + 3381083.

It is an arithmetic number, because the mean of its divisors is an integer number (23667448).

Almost surely, 2^135242540 is an apocalyptic number.

135242540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135242540 is an abundant number, since it is smaller than the sum of its proper divisors (148766836).

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

135242540 is a wasteful number, since it uses less digits than its factorization.

135242540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762136 (or 6762134 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 135242540 is about 11629.3826147393. The cubic root of 135242540 is about 513.2998132195.

Subtracting from 135242540 its reverse (45242531), we obtain a palindrome (90000009).

The spelling of 135242540 in words is "one hundred thirty-five million, two hundred forty-two thousand, five hundred forty".