6404503 has 8 divisors (see below), whose sum is σ = 7339808. Its totient is φ = 5474304.

The previous prime is 6404477. The next prime is 6404521. The reversal of 6404503 is 3054046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6404503 - 2²¹ = 4307351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404003) 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 7 ways as a sum of consecutive naturals, for example, 1975 + ... + 4087.

It is an arithmetic number, because the mean of its divisors is an integer number (917476).

Almost surely, 2^6404503 is an apocalyptic number.

6404503 is a deficient number, since it is larger than the sum of its proper divisors (935305).

6404503 is a wasteful number, since it uses less digits than its factorization.

6404503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6404503 is about 2530.7119551620. The cubic root of 6404503 is about 185.7070870413.

Adding to 6404503 its reverse (3054046), we get a palindrome (9458549).

The spelling of 6404503 in words is "six million, four hundred four thousand, five hundred three".