6721142 has 16 divisors (see below), whose sum is σ = 10361520. Its totient is φ = 3268512.

The previous prime is 6721133. The next prime is 6721147. The reversal of 6721142 is 2411276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17084 + ... + 17472.

It is an arithmetic number, because the mean of its divisors is an integer number (647595).

Almost surely, 2^6721142 is an apocalyptic number.

6721142 is a deficient number, since it is larger than the sum of its proper divisors (3640378).

6721142 is a wasteful number, since it uses less digits than its factorization.

6721142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607.

The product of its digits is 672, while the sum is 23.

The square root of 6721142 is about 2592.5165380379. The cubic root of 6721142 is about 188.7184483027.

The spelling of 6721142 in words is "six million, seven hundred twenty-one thousand, one hundred forty-two".