6731421 has 8 divisors (see below), whose sum is σ = 9194304. Its totient is φ = 4378080.

The previous prime is 6731407. The next prime is 6731437. The reversal of 6731421 is 1241376.

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

It is not a de Polignac number, because 6731421 - 2⁹ = 6730909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6731391 and 6731400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731401) 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, 27241 + ... + 27486.

It is an arithmetic number, because the mean of its divisors is an integer number (1149288).

Almost surely, 2^6731421 is an apocalyptic number.

It is an amenable number.

6731421 is a deficient number, since it is larger than the sum of its proper divisors (2462883).

6731421 is a wasteful number, since it uses less digits than its factorization.

6731421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54771.

The product of its digits is 1008, while the sum is 24.

The square root of 6731421 is about 2594.4982173823. The cubic root of 6731421 is about 188.8146050208.

Adding to 6731421 its reverse (1241376), we get a palindrome (7972797).

The spelling of 6731421 in words is "six million, seven hundred thirty-one thousand, four hundred twenty-one".