6420285 has 12 divisors (see below), whose sum is σ = 11128572. Its totient is φ = 3424128.

The previous prime is 6420259. The next prime is 6420307. The reversal of 6420285 is 5820246.

It can be written as a sum of positive squares in 2 ways, for example, as 2893401 + 3526884 = 1701^2 + 1878^2 .

It is not a de Polignac number, because 6420285 - 2⁶ = 6420221 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71292 + ... + 71381.

It is an arithmetic number, because the mean of its divisors is an integer number (927381).

Almost surely, 2^6420285 is an apocalyptic number.

It is an amenable number.

6420285 is a deficient number, since it is larger than the sum of its proper divisors (4708287).

6420285 is a wasteful number, since it uses less digits than its factorization.

6420285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142684 (or 142681 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 6420285 is about 2533.8281315038. The cubic root of 6420285 is about 185.8595019465.

The spelling of 6420285 in words is "six million, four hundred twenty thousand, two hundred eighty-five".