135442541 has 4 divisors (see below), whose sum is σ = 145861212. Its totient is φ = 125023872.

The previous prime is 135442537. The next prime is 135442547. The reversal of 135442541 is 145244531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145244531 = 19 ⋅7644449.

It can be written as a sum of positive squares in 2 ways, for example, as 50268100 + 85174441 = 7090^2 + 9229^2 .

It is a cyclic number.

It is not a de Polignac number, because 135442541 - 2² = 135442537 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 (135442547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5209316 + ... + 5209341.

It is an arithmetic number, because the mean of its divisors is an integer number (36465303).

Almost surely, 2^135442541 is an apocalyptic number.

It is an amenable number.

135442541 is a deficient number, since it is larger than the sum of its proper divisors (10418671).

135442541 is a wasteful number, since it uses less digits than its factorization.

135442541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418670.

The product of its digits is 9600, while the sum is 29.

The square root of 135442541 is about 11637.9783897376. The cubic root of 135442541 is about 513.5527166615.

The spelling of 135442541 in words is "one hundred thirty-five million, four hundred forty-two thousand, five hundred forty-one".