648595 has 4 divisors (see below), whose sum is σ = 778320. Its totient is φ = 518872.

The previous prime is 648563. The next prime is 648607. The reversal of 648595 is 595846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648595 - 2⁵ = 648563 is a prime.

648595 is a lucky number.

It is an unprimeable number.

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, 64855 + ... + 64864.

It is an arithmetic number, because the mean of its divisors is an integer number (194580).

2⁶⁴⁸⁵⁹⁵ is an apocalyptic number.

648595 is a deficient number, since it is larger than the sum of its proper divisors (129725).

648595 is a wasteful number, since it uses less digits than its factorization.

648595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129724.

The product of its digits is 43200, while the sum is 37.

The square root of 648595 is about 805.3539594489. The cubic root of 648595 is about 86.5614518721.

The spelling of 648595 in words is "six hundred forty-eight thousand, five hundred ninety-five".