6744021 has 8 divisors (see below), whose sum is σ = 9004800. Its totient is φ = 4489632.

The previous prime is 6744013. The next prime is 6744041. The reversal of 6744021 is 1204476.

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

It is not a de Polignac number, because 6744021 - 2³ = 6744013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6743982 and 6744000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6744041) 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, 2076 + ... + 4218.

It is an arithmetic number, because the mean of its divisors is an integer number (1125600).

Almost surely, 2^6744021 is an apocalyptic number.

It is an amenable number.

6744021 is a deficient number, since it is larger than the sum of its proper divisors (2260779).

6744021 is a wasteful number, since it uses less digits than its factorization.

6744021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 6744021 is about 2596.9252973468. The cubic root of 6744021 is about 188.9323404971.

Adding to 6744021 its reverse (1204476), we get a palindrome (7948497).

The spelling of 6744021 in words is "six million, seven hundred forty-four thousand, twenty-one".