6721430 has 8 divisors (see below), whose sum is σ = 12098592. Its totient is φ = 2688568.

The previous prime is 6721427. The next prime is 6721433. The reversal of 6721430 is 341276.

It is an interprime number because it is at equal distance from previous prime (6721427) and next prime (6721433).

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

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6721396 and 6721405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721433) 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 3 ways as a sum of consecutive naturals, for example, 336062 + ... + 336081.

It is an arithmetic number, because the mean of its divisors is an integer number (1512324).

Almost surely, 2^6721430 is an apocalyptic number.

6721430 is a deficient number, since it is larger than the sum of its proper divisors (5377162).

6721430 is a wasteful number, since it uses less digits than its factorization.

6721430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672150.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 6721430 is about 2592.5720819294. The cubic root of 6721430 is about 188.7211437839.

The spelling of 6721430 in words is "six million, seven hundred twenty-one thousand, four hundred thirty".