172405271 has 8 divisors (see below), whose sum is σ = 175244160. Its totient is φ = 169574328.

The previous prime is 172405267. The next prime is 172405273. The reversal of 172405271 is 172504271.

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 172405271 - 2² = 172405267 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 (172405273) 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 7 ways as a sum of consecutive naturals, for example, 54680 + ... + 57746.

It is an arithmetic number, because the mean of its divisors is an integer number (21905520).

Almost surely, 2^172405271 is an apocalyptic number.

172405271 is a deficient number, since it is larger than the sum of its proper divisors (2838889).

172405271 is an equidigital number, since it uses as much as digits as its factorization.

172405271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 172405271 is about 13130.3187699309. The cubic root of 172405271 is about 556.5662233266.

The spelling of 172405271 in words is "one hundred seventy-two million, four hundred five thousand, two hundred seventy-one".