172106105 has 8 divisors (see below), whose sum is σ = 210424392. Its totient is φ = 135086848.

The previous prime is 172106093. The next prime is 172106107. The reversal of 172106105 is 501601271.

It can be written as a sum of positive squares in 4 ways, for example, as 21381376 + 150724729 = 4624^2 + 12277^2 .

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 172106105 - 2¹⁰ = 172105081 is a prime.

It is a super-2 number, since 2×172106105² = 59241022756542050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172106107) 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 7 ways as a sum of consecutive naturals, for example, 324464 + ... + 324993.

It is an arithmetic number, because the mean of its divisors is an integer number (26303049).

Almost surely, 2^172106105 is an apocalyptic number.

It is an amenable number.

172106105 is a deficient number, since it is larger than the sum of its proper divisors (38318287).

172106105 is an equidigital number, since it uses as much as digits as its factorization.

172106105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649515.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 172106105 is about 13118.9216401349. The cubic root of 172106105 is about 556.2441100247.

Adding to 172106105 its reverse (501601271), we get a palindrome (673707376).

The spelling of 172106105 in words is "one hundred seventy-two million, one hundred six thousand, one hundred five".