6404501 has 12 divisors (see below), whose sum is σ = 6862572. Its totient is φ = 5975424.

The previous prime is 6404477. The next prime is 6404521. The reversal of 6404501 is 1054046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 763876 + 5640625 = 874^2 + 2375^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6404501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40715 + ... + 40871.

It is an arithmetic number, because the mean of its divisors is an integer number (571881).

Almost surely, 2^6404501 is an apocalyptic number.

It is an amenable number.

6404501 is a deficient number, since it is larger than the sum of its proper divisors (458071).

6404501 is a wasteful number, since it uses less digits than its factorization.

6404501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 6404501 is about 2530.7115600163. The cubic root of 6404501 is about 185.7070677105.

Adding to 6404501 its reverse (1054046), we get a palindrome (7458547).

The spelling of 6404501 in words is "six million, four hundred four thousand, five hundred one".