648171 has 6 divisors (see below), whose sum is σ = 936260. Its totient is φ = 432108.

The previous prime is 648133. The next prime is 648173. The reversal of 648171 is 171846.

It is a happy number.

648171 is a `hidden beast` number, since 648 + 17 + 1 = 666.

It is not a de Polignac number, because 648171 - 2⁶ = 648107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648173) 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 5 ways as a sum of consecutive naturals, for example, 36001 + ... + 36018.

2⁶⁴⁸¹⁷¹ is an apocalyptic number.

648171 is a deficient number, since it is larger than the sum of its proper divisors (288089).

648171 is a wasteful number, since it uses less digits than its factorization.

648171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72025 (or 72022 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 648171 is about 805.0906781227. The cubic root of 648171 is about 86.5425854217.

The spelling of 648171 in words is "six hundred forty-eight thousand, one hundred seventy-one".