648865 has 8 divisors (see below), whose sum is σ = 889920. Its totient is φ = 444912.

The previous prime is 648863. The next prime is 648871. The reversal of 648865 is 568846.

648865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648865 - 2¹ = 648863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9235 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (111240).

2⁶⁴⁸⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

648865 is a deficient number, since it is larger than the sum of its proper divisors (241055).

648865 is a wasteful number, since it uses less digits than its factorization.

648865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18551.

The product of its digits is 46080, while the sum is 37.

The square root of 648865 is about 805.5215701643. The cubic root of 648865 is about 86.5734616006.

The spelling of 648865 in words is "six hundred forty-eight thousand, eight hundred sixty-five".