648571 has 8 divisors (see below), whose sum is σ = 808704. Its totient is φ = 505320.

The previous prime is 648563. The next prime is 648607. The reversal of 648571 is 175846.

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 648571 - 2³ = 648563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648371) 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 7 ways as a sum of consecutive naturals, for example, 4135 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2⁶⁴⁸⁵⁷¹ is an apocalyptic number.

648571 is a deficient number, since it is larger than the sum of its proper divisors (160133).

648571 is a wasteful number, since it uses less digits than its factorization.

648571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441.

The product of its digits is 6720, while the sum is 31.

The square root of 648571 is about 805.3390590304. The cubic root of 648571 is about 86.5603841794.

It can be divided in two parts, 6485 and 71, that added together give a palindrome (6556).

The spelling of 648571 in words is "six hundred forty-eight thousand, five hundred seventy-one".