6378543 has 12 divisors (see below), whose sum is σ = 9238320. Its totient is φ = 4240896.

The previous prime is 6378517. The next prime is 6378551. The reversal of 6378543 is 3458736.

It is a happy number.

It is not a de Polignac number, because 6378543 - 2⁸ = 6378287 is a prime.

6378543 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6378498 and 6378507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3823 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (769860).

Almost surely, 2^6378543 is an apocalyptic number.

6378543 is a deficient number, since it is larger than the sum of its proper divisors (2859777).

6378543 is a wasteful number, since it uses less digits than its factorization.

6378543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1915 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6378543 is about 2525.5777556828. The cubic root of 6378543 is about 185.4558323414.

It can be divided in two parts, 637 and 8543, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 6378543 in words is "six million, three hundred seventy-eight thousand, five hundred forty-three".