135240541 has 4 divisors (see below), whose sum is σ = 135729052. Its totient is φ = 134752032.

The previous prime is 135240533. The next prime is 135240571. The reversal of 135240541 is 145042531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145042531 = 23 ⋅6306197.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 123876900 = 3371^2 + 11130^2 .

It is a cyclic number.

It is not a de Polignac number, because 135240541 - 2³ = 135240533 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 (135240571) 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, 243840 + ... + 244393.

It is an arithmetic number, because the mean of its divisors is an integer number (33932263).

Almost surely, 2^135240541 is an apocalyptic number.

It is an amenable number.

135240541 is a deficient number, since it is larger than the sum of its proper divisors (488511).

135240541 is an equidigital number, since it uses as much as digits as its factorization.

135240541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488510.

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

The square root of 135240541 is about 11629.2966683287. The cubic root of 135240541 is about 513.2972842041.

The spelling of 135240541 in words is "one hundred thirty-five million, two hundred forty thousand, five hundred forty-one".