648243 has 20 divisors (see below), whose sum is σ = 993168. Its totient is φ = 421200.

The previous prime is 648239. The next prime is 648257. The reversal of 648243 is 342846.

648243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648243 - 2² = 648239 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 6⁶ + 4⁶ + 2 + 8³ + 4⁸ + 3¹² .

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 19 ways as a sum of consecutive naturals, for example, 4218 + ... + 4368.

2⁶⁴⁸²⁴³ is an apocalyptic number.

648243 is a deficient number, since it is larger than the sum of its proper divisors (344925).

648243 is a wasteful number, since it uses less digits than its factorization.

648243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 207 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 648243 is about 805.1353923409. The cubic root of 648243 is about 86.5457897384.

It can be divided in two parts, 648 and 243, that multiplied together give a cube (157464 = 54³).

The spelling of 648243 in words is "six hundred forty-eight thousand, two hundred forty-three".