6420306 has 16 divisors (see below), whose sum is σ = 12890304. Its totient is φ = 2131824.

The previous prime is 6420259. The next prime is 6420307. The reversal of 6420306 is 6030246.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6420307) 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, 270 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (805644).

Almost surely, 2^6420306 is an apocalyptic number.

6420306 is an abundant number, since it is smaller than the sum of its proper divisors (6469998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6420306 is a wasteful number, since it uses less digits than its factorization.

6420306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 6420306 is about 2533.8322754279. The cubic root of 6420306 is about 185.8597045878.

The spelling of 6420306 in words is "six million, four hundred twenty thousand, three hundred six".