6421315 has 4 divisors (see below), whose sum is σ = 7705584. Its totient is φ = 5137048.

The previous prime is 6421279. The next prime is 6421339. The reversal of 6421315 is 5131246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6421315 - 2¹¹ = 6419267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 642127 + ... + 642136.

It is an arithmetic number, because the mean of its divisors is an integer number (1926396).

Almost surely, 2^6421315 is an apocalyptic number.

6421315 is a deficient number, since it is larger than the sum of its proper divisors (1284269).

6421315 is a wasteful number, since it uses less digits than its factorization.

6421315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284268.

The product of its digits is 720, while the sum is 22.

The square root of 6421315 is about 2534.0313731286. The cubic root of 6421315 is about 185.8694405006.

The spelling of 6421315 in words is "six million, four hundred twenty-one thousand, three hundred fifteen".