135172505 has 8 divisors (see below), whose sum is σ = 174684552. Its totient is φ = 99819648.

The previous prime is 135172501. The next prime is 135172511. The reversal of 135172505 is 505271531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 913936 + 134258569 = 956^2 + 11587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135172505 - 2² = 135172501 is a prime.

It is a super-2 number, since 2×135172505² = 36543212215950050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039724 + ... + 1039853.

It is an arithmetic number, because the mean of its divisors is an integer number (21835569).

Almost surely, 2^135172505 is an apocalyptic number.

It is an amenable number.

135172505 is a deficient number, since it is larger than the sum of its proper divisors (39512047).

135172505 is a wasteful number, since it uses less digits than its factorization.

135172505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079595.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 135172505 is about 11626.3711019389. The cubic root of 135172505 is about 513.2111942599.

The spelling of 135172505 in words is "one hundred thirty-five million, one hundred seventy-two thousand, five hundred five".