6744521 has 8 divisors (see below), whose sum is σ = 7728384. Its totient is φ = 5765760.

The previous prime is 6744511. The next prime is 6744523. The reversal of 6744521 is 1254476.

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

It is a de Polignac number, because none of the positive numbers 2^k-6744521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6744523) 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, 2201 + ... + 4281.

It is an arithmetic number, because the mean of its divisors is an integer number (966048).

Almost surely, 2^6744521 is an apocalyptic number.

It is an amenable number.

6744521 is a deficient number, since it is larger than the sum of its proper divisors (983863).

6744521 is a wasteful number, since it uses less digits than its factorization.

6744521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551.

The product of its digits is 6720, while the sum is 29.

The square root of 6744521 is about 2597.0215632528. The cubic root of 6744521 is about 188.9370095136.

Adding to 6744521 its reverse (1254476), we get a palindrome (7998997).

The spelling of 6744521 in words is "six million, seven hundred forty-four thousand, five hundred twenty-one".