172105135 has 16 divisors (see below), whose sum is σ = 222456960. Its totient is φ = 127401120.

The previous prime is 172105133. The next prime is 172105139. The reversal of 172105135 is 531501271.

172105135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172105135 - 2¹ = 172105133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172105133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16981 + ... + 25150.

It is an arithmetic number, because the mean of its divisors is an integer number (13903560).

Almost surely, 2^172105135 is an apocalyptic number.

172105135 is a deficient number, since it is larger than the sum of its proper divisors (50351825).

172105135 is a wasteful number, since it uses less digits than its factorization.

172105135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42198.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 172105135 is about 13118.8846705808. The cubic root of 172105135 is about 556.2430650147.

The spelling of 172105135 in words is "one hundred seventy-two million, one hundred five thousand, one hundred thirty-five".