6740421 has 8 divisors (see below), whose sum is σ = 9460320. Its totient is φ = 4257072.

The previous prime is 6740407. The next prime is 6740429. The reversal of 6740421 is 1240476.

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

It is not a de Polignac number, because 6740421 - 2⁵ = 6740389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6740391 and 6740400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6740429) 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, 59070 + ... + 59183.

It is an arithmetic number, because the mean of its divisors is an integer number (1182540).

Almost surely, 2^6740421 is an apocalyptic number.

It is an amenable number.

6740421 is a deficient number, since it is larger than the sum of its proper divisors (2719899).

6740421 is a wasteful number, since it uses less digits than its factorization.

6740421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118275.

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

The square root of 6740421 is about 2596.2320774538. The cubic root of 6740421 is about 188.8987167641.

Adding to 6740421 its reverse (1240476), we get a palindrome (7980897).

Subtracting from 6740421 its reverse (1240476), we obtain a palindrome (5499945).

The spelling of 6740421 in words is "six million, seven hundred forty thousand, four hundred twenty-one".