172260005 has 4 divisors (see below), whose sum is σ = 206712012. Its totient is φ = 137808000.

The previous prime is 172260001. The next prime is 172260037. The reversal of 172260005 is 500062271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97160449 + 75099556 = 9857^2 + 8666^2 .

It is not a de Polignac number, because 172260005 - 2² = 172260001 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 (172260001) 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 3 ways as a sum of consecutive naturals, for example, 17225996 + ... + 17226005.

It is an arithmetic number, because the mean of its divisors is an integer number (51678003).

Almost surely, 2^172260005 is an apocalyptic number.

It is an amenable number.

172260005 is a deficient number, since it is larger than the sum of its proper divisors (34452007).

172260005 is an equidigital number, since it uses as much as digits as its factorization.

172260005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34452006.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 172260005 is about 13124.7859030157. The cubic root of 172260005 is about 556.4098613878.

The spelling of 172260005 in words is "one hundred seventy-two million, two hundred sixty thousand, five".