6423543 has 20 divisors (see below), whose sum is σ = 10967440. Its totient is φ = 3670272.

The previous prime is 6423523. The next prime is 6423551. The reversal of 6423543 is 3453246.

It is not a de Polignac number, because 6423543 - 2¹⁰ = 6422519 is a prime.

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 + 4² + 2²¹ + 3⁶ + 5⁷ + 4¹¹ + 3⁸ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423503) 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, 5098 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (548372).

Almost surely, 2^6423543 is an apocalyptic number.

6423543 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6423543 is a deficient number, since it is larger than the sum of its proper divisors (4543897).

6423543 is a wasteful number, since it uses less digits than its factorization.

6423543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348 (or 11339 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 6423543 is about 2534.4709507114. The cubic root of 6423543 is about 185.8909350194.

Adding to 6423543 its reverse (3453246), we get a palindrome (9876789).

The spelling of 6423543 in words is "six million, four hundred twenty-three thousand, five hundred forty-three".