654242543 has 4 divisors (see below), whose sum is σ = 655543728. Its totient is φ = 652941360.

The previous prime is 654242503. The next prime is 654242551. The reversal of 654242543 is 345242456.

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 654242543 - 2⁸ = 654242287 is a prime.

It is a super-2 number, since 2×654242543² = 856066610142213698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654242503) 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, 649838 + ... + 650843.

It is an arithmetic number, because the mean of its divisors is an integer number (163885932).

Almost surely, 2^654242543 is an apocalyptic number.

654242543 is a deficient number, since it is larger than the sum of its proper divisors (1301185).

654242543 is a wasteful number, since it uses less digits than its factorization.

654242543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301184.

The product of its digits is 115200, while the sum is 35.

The square root of 654242543 is about 25578.1653564129. The cubic root of 654242543 is about 868.1196642308.

Adding to 654242543 its reverse (345242456), we get a palindrome (999484999).

The spelling of 654242543 in words is "six hundred fifty-four million, two hundred forty-two thousand, five hundred forty-three".