172084145 has 4 divisors (see below), whose sum is σ = 206500980. Its totient is φ = 137667312.

The previous prime is 172084139. The next prime is 172084147. The reversal of 172084145 is 541480271.

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: 541480271 = 1117 ⋅484763.

It can be written as a sum of positive squares in 2 ways, for example, as 103144336 + 68939809 = 10156^2 + 8303^2 .

It is a cyclic number.

It is not a de Polignac number, because 172084145 - 2⁸ = 172083889 is a prime.

It is a super-3 number, since 3×172084145³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172084147) 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, 17208410 + ... + 17208419.

It is an arithmetic number, because the mean of its divisors is an integer number (51625245).

Almost surely, 2^172084145 is an apocalyptic number.

It is an amenable number.

172084145 is a deficient number, since it is larger than the sum of its proper divisors (34416835).

172084145 is an equidigital number, since it uses as much as digits as its factorization.

172084145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34416834.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 172084145 is about 13118.0846543998. The cubic root of 172084145 is about 556.2204508984.

The spelling of 172084145 in words is "one hundred seventy-two million, eighty-four thousand, one hundred forty-five".