6739221 has 8 divisors (see below), whose sum is σ = 9011584. Its totient is φ = 4479840.

The previous prime is 6739199. The next prime is 6739231. The reversal of 6739221 is 1229376.

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

It is not a de Polignac number, because 6739221 - 2¹⁰ = 6738197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6739231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1960 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (1126448).

Almost surely, 2^6739221 is an apocalyptic number.

It is an amenable number.

6739221 is a deficient number, since it is larger than the sum of its proper divisors (2272363).

6739221 is a wasteful number, since it uses less digits than its factorization.

6739221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491.

The product of its digits is 4536, while the sum is 30.

The square root of 6739221 is about 2596.0009630199. Note that the first 3 decimals coincide. The cubic root of 6739221 is about 188.8875061926.

The spelling of 6739221 in words is "six million, seven hundred thirty-nine thousand, two hundred twenty-one".