172725771 has 8 divisors (see below), whose sum is σ = 232889040. Its totient is φ = 113856512.

The previous prime is 172725757. The next prime is 172725793. The reversal of 172725771 is 177527271.

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 172725771 - 2²⁵ = 139171339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172725701) 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, 323190 + ... + 323723.

It is an arithmetic number, because the mean of its divisors is an integer number (29111130).

Almost surely, 2^172725771 is an apocalyptic number.

172725771 is a deficient number, since it is larger than the sum of its proper divisors (60163269).

172725771 is an equidigital number, since it uses as much as digits as its factorization.

172725771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647005.

The product of its digits is 48020, while the sum is 39.

The square root of 172725771 is about 13142.5176811751. The cubic root of 172725771 is about 556.9108938660.

The spelling of 172725771 in words is "one hundred seventy-two million, seven hundred twenty-five thousand, seven hundred seventy-one".