648601 has 4 divisors (see below), whose sum is σ = 686772. Its totient is φ = 610432.

The previous prime is 648563. The next prime is 648607. The reversal of 648601 is 106846.

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 488601 + 160000 = 699^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 648601 - 2¹⁵ = 615833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648607) 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, 19060 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (171693).

2⁶⁴⁸⁶⁰¹ is an apocalyptic number.

It is an amenable number.

648601 is a deficient number, since it is larger than the sum of its proper divisors (38171).

648601 is a wasteful number, since it uses less digits than its factorization.

648601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38170.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 648601 is about 805.3576845104. The cubic root of 648601 is about 86.5617187911.

The spelling of 648601 in words is "six hundred forty-eight thousand, six hundred one".