6404042 has 8 divisors (see below), whose sum is σ = 9916032. Its totient is φ = 3098700.

The previous prime is 6404023. The next prime is 6404059. The reversal of 6404042 is 2404046.

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

It is a super-3 number, since 3×6404042³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 51584 + ... + 51707.

It is an arithmetic number, because the mean of its divisors is an integer number (1239504).

Almost surely, 2^6404042 is an apocalyptic number.

6404042 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6404042 is a deficient number, since it is larger than the sum of its proper divisors (3511990).

6404042 is a wasteful number, since it uses less digits than its factorization.

6404042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103324.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 6404042 is about 2530.6208724343. The cubic root of 6404042 is about 185.7026311649.

Adding to 6404042 its reverse (2404046), we get a palindrome (8808088).

The spelling of 6404042 in words is "six million, four hundred four thousand, forty-two".