6404522 has 8 divisors (see below), whose sum is σ = 9706116. Its totient is φ = 3169152.

The previous prime is 6404521. The next prime is 6404527. The reversal of 6404522 is 2254046.

It can be written as a sum of positive squares in 2 ways, for example, as 6145441 + 259081 = 2479^2 + 509^2 .

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

It is an Ulam 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 3 ways as a sum of consecutive naturals, for example, 16313 + ... + 16700.

Almost surely, 2^6404522 is an apocalyptic number.

6404522 is a deficient number, since it is larger than the sum of its proper divisors (3301594).

6404522 is a wasteful number, since it uses less digits than its factorization.

6404522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33112.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6404522 is about 2530.7157090436. The cubic root of 6404522 is about 185.7072706846.

Adding to 6404522 its reverse (2254046), we get a palindrome (8658568).

The spelling of 6404522 in words is "six million, four hundred four thousand, five hundred twenty-two".