648287 has 4 divisors (see below), whose sum is σ = 651840. Its totient is φ = 644736.

The previous prime is 648283. The next prime is 648289. The reversal of 648287 is 782846.

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 648287 - 2² = 648283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648287.

It is not an unprimeable number, because it can be changed into a prime (648283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1487 + ... + 1872.

It is an arithmetic number, because the mean of its divisors is an integer number (162960).

2⁶⁴⁸²⁸⁷ is an apocalyptic number.

648287 is a deficient number, since it is larger than the sum of its proper divisors (3553).

648287 is a wasteful number, since it uses less digits than its factorization.

648287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552.

The product of its digits is 21504, while the sum is 35.

The square root of 648287 is about 805.1627164741. The cubic root of 648287 is about 86.5477478151.

The spelling of 648287 in words is "six hundred forty-eight thousand, two hundred eighty-seven".