172240265 has 4 divisors (see below), whose sum is σ = 206688324. Its totient is φ = 137792208.

The previous prime is 172240259. The next prime is 172240267. The reversal of 172240265 is 562042271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562042271 = 7 ⋅80291753.

It can be written as a sum of positive squares in 2 ways, for example, as 54213769 + 118026496 = 7363^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 172240265 - 2²⁰ = 171191689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172240267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17224022 + ... + 17224031.

It is an arithmetic number, because the mean of its divisors is an integer number (51672081).

Almost surely, 2^172240265 is an apocalyptic number.

It is an amenable number.

172240265 is a deficient number, since it is larger than the sum of its proper divisors (34448059).

172240265 is an equidigital number, since it uses as much as digits as its factorization.

172240265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34448058.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 172240265 is about 13124.0338692035. The cubic root of 172240265 is about 556.3886067922.

The spelling of 172240265 in words is "one hundred seventy-two million, two hundred forty thousand, two hundred sixty-five".