135172541 has 16 divisors (see below), whose sum is σ = 162048000. Its totient is φ = 110241648.

The previous prime is 135172529. The next prime is 135172561. The reversal of 135172541 is 145271531.

It is a cyclic number.

It is not a de Polignac number, because 135172541 - 2¹⁴ = 135156157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135172501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29930 + ... + 34148.

It is an arithmetic number, because the mean of its divisors is an integer number (10128000).

Almost surely, 2^135172541 is an apocalyptic number.

It is an amenable number.

135172541 is a deficient number, since it is larger than the sum of its proper divisors (26875459).

135172541 is a wasteful number, since it uses less digits than its factorization.

135172541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448.

The product of its digits is 4200, while the sum is 29.

The square root of 135172541 is about 11626.3726501433. The cubic root of 135172541 is about 513.2112398204.

The spelling of 135172541 in words is "one hundred thirty-five million, one hundred seventy-two thousand, five hundred forty-one".