6743021 has 4 divisors (see below), whose sum is σ = 6782172. Its totient is φ = 6703872.

The previous prime is 6743017. The next prime is 6743053. The reversal of 6743021 is 1203476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 3553225 = 1786^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 6743021 - 2² = 6743017 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 (6740021) 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, 19316 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (1695543).

Almost surely, 2^6743021 is an apocalyptic number.

It is an amenable number.

6743021 is a deficient number, since it is larger than the sum of its proper divisors (39151).

6743021 is a wasteful number, since it uses less digits than its factorization.

6743021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39150.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 6743021 is about 2596.7327548287. The cubic root of 6743021 is about 188.9230017718.

Adding to 6743021 its reverse (1203476), we get a palindrome (7946497).

The spelling of 6743021 in words is "six million, seven hundred forty-three thousand, twenty-one".