6721742 has 8 divisors (see below), whose sum is σ = 10141416. Its totient is φ = 3341272.

The previous prime is 6721739. The next prime is 6721747. The reversal of 6721742 is 2471276.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9368 + ... + 10059.

It is an arithmetic number, because the mean of its divisors is an integer number (1267677).

Almost surely, 2^6721742 is an apocalyptic number.

6721742 is a deficient number, since it is larger than the sum of its proper divisors (3419674).

6721742 is a wasteful number, since it uses less digits than its factorization.

6721742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19602.

The product of its digits is 4704, while the sum is 29.

The square root of 6721742 is about 2592.6322531358. The cubic root of 6721742 is about 188.7240638017.

The spelling of 6721742 in words is "six million, seven hundred twenty-one thousand, seven hundred forty-two".