654243 has 4 divisors (see below), whose sum is σ = 872328. Its totient is φ = 436160.

The previous prime is 654233. The next prime is 654257. The reversal of 654243 is 342456.

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 654243 - 2¹⁸ = 392099 is a prime.

It is a D-number.

654243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (654223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109038 + ... + 109043.

It is an arithmetic number, because the mean of its divisors is an integer number (218082).

2⁶⁵⁴²⁴³ is an apocalyptic number.

654243 is a deficient number, since it is larger than the sum of its proper divisors (218085).

654243 is a wasteful number, since it uses less digits than its factorization.

654243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218084.

The product of its digits is 2880, while the sum is 24.

The square root of 654243 is about 808.8528914457. The cubic root of 654243 is about 86.8119866363.

Adding to 654243 its reverse (342456), we get a palindrome (996699).

The spelling of 654243 in words is "six hundred fifty-four thousand, two hundred forty-three".