6404543 has 4 divisors (see below), whose sum is σ = 6428448. Its totient is φ = 6380640.

The previous prime is 6404527. The next prime is 6404551. The reversal of 6404543 is 3454046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3454046 = 2 ⋅1727023.

It is a cyclic number.

It is not a de Polignac number, because 6404543 - 2⁴ = 6404527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404243) 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, 11546 + ... + 12087.

It is an arithmetic number, because the mean of its divisors is an integer number (1607112).

Almost surely, 2^6404543 is an apocalyptic number.

6404543 is a deficient number, since it is larger than the sum of its proper divisors (23905).

6404543 is a wasteful number, since it uses less digits than its factorization.

6404543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23904.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 6404543 is about 2530.7198580641. The cubic root of 6404543 is about 185.7074736583.

Adding to 6404543 its reverse (3454046), we get a palindrome (9858589).

The spelling of 6404543 in words is "six million, four hundred four thousand, five hundred forty-three".