6421242 has 8 divisors (see below), whose sum is σ = 12842496. Its totient is φ = 2140412.

The previous prime is 6421237. The next prime is 6421243. The reversal of 6421242 is 2421246.

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

6421242 is an admirable number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6421243) 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, 535098 + ... + 535109.

It is an arithmetic number, because the mean of its divisors is an integer number (1605312).

Almost surely, 2^6421242 is an apocalyptic number.

6421242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421242 is a wasteful number, since it uses less digits than its factorization.

6421242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070212.

The product of its digits is 768, while the sum is 21.

The square root of 6421242 is about 2534.0169691618. The cubic root of 6421242 is about 185.8687361527.

Adding to 6421242 its reverse (2421246), we get a palindrome (8842488).

The spelling of 6421242 in words is "six million, four hundred twenty-one thousand, two hundred forty-two".