172120735 has 8 divisors (see below), whose sum is σ = 208475856. Its totient is φ = 136409280.

The previous prime is 172120723. The next prime is 172120757. The reversal of 172120735 is 537021271.

172120735 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 172120735 - 2⁵ = 172120703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160326 + ... + 161395.

It is an arithmetic number, because the mean of its divisors is an integer number (26059482).

Almost surely, 2^172120735 is an apocalyptic number.

172120735 is a deficient number, since it is larger than the sum of its proper divisors (36355121).

172120735 is a wasteful number, since it uses less digits than its factorization.

172120735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321833.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 172120735 is about 13119.4792198471. The cubic root of 172120735 is about 556.2598708849.

The spelling of 172120735 in words is "one hundred seventy-two million, one hundred twenty thousand, seven hundred thirty-five".