6916421 has 8 divisors (see below), whose sum is σ = 7117440. Its totient is φ = 6717312.

The previous prime is 6916411. The next prime is 6916439. The reversal of 6916421 is 1246196.

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

It is a cyclic number.

It is not a de Polignac number, because 6916421 - 2²² = 2722117 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 (6916411) 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, 9941 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (889680).

Almost surely, 2^6916421 is an apocalyptic number.

It is an amenable number.

6916421 is a deficient number, since it is larger than the sum of its proper divisors (201019).

6916421 is a wasteful number, since it uses less digits than its factorization.

6916421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its digits is 2592, while the sum is 29.

The square root of 6916421 is about 2629.9089337846. The cubic root of 6916421 is about 190.5287304280.

It can be divided in two parts, 6916 and 421, that added together give a palindrome (7337).

The spelling of 6916421 in words is "six million, nine hundred sixteen thousand, four hundred twenty-one".