172398241 has 8 divisors (see below), whose sum is σ = 185984424. Its totient is φ = 159194880.

The previous prime is 172398199. The next prime is 172398253. The reversal of 172398241 is 142893271.

It can be written as a sum of positive squares in 4 ways, for example, as 112784400 + 59613841 = 10620^2 + 7721^2 .

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 172398241 - 2¹⁹ = 171873953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172398241.

It is not an unprimeable number, because it can be changed into a prime (172398841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94770 + ... + 96571.

It is an arithmetic number, because the mean of its divisors is an integer number (23248053).

Almost surely, 2^172398241 is an apocalyptic number.

It is an amenable number.

172398241 is a deficient number, since it is larger than the sum of its proper divisors (13586183).

172398241 is a wasteful number, since it uses less digits than its factorization.

172398241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191411.

The product of its digits is 24192, while the sum is 37.

The square root of 172398241 is about 13130.0510661612. The cubic root of 172398241 is about 556.5586583728.

The spelling of 172398241 in words is "one hundred seventy-two million, three hundred ninety-eight thousand, two hundred forty-one".