172007201 has 4 divisors (see below), whose sum is σ = 172880532. Its totient is φ = 171133872.

The previous prime is 172007183. The next prime is 172007203. The reversal of 172007201 is 102700271.

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 78304801 + 93702400 = 8849^2 + 9680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172007201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172007203) 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, 436370 + ... + 436763.

It is an arithmetic number, because the mean of its divisors is an integer number (43220133).

Almost surely, 2^172007201 is an apocalyptic number.

It is an amenable number.

172007201 is a deficient number, since it is larger than the sum of its proper divisors (873331).

172007201 is an equidigital number, since it uses as much as digits as its factorization.

172007201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873330.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 172007201 is about 13115.1515812819. The cubic root of 172007201 is about 556.1375375720.

Adding to 172007201 its reverse (102700271), we get a palindrome (274707472).

The spelling of 172007201 in words is "one hundred seventy-two million, seven thousand, two hundred one".