6420001 has 8 divisors (see below), whose sum is σ = 7352640. Its totient is φ = 5491248.

The previous prime is 6419989. The next prime is 6420023. The reversal of 6420001 is 1000246.

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

It is not a de Polignac number, because 6420001 - 2⁵ = 6419969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5235 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (919080).

Almost surely, 2^6420001 is an apocalyptic number.

It is an amenable number.

6420001 is a deficient number, since it is larger than the sum of its proper divisors (932639).

6420001 is a wasteful number, since it uses less digits than its factorization.

6420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 6420001 is about 2533.7720891982. The cubic root of 6420001 is about 185.8567614203.

Adding to 6420001 its reverse (1000246), we get a palindrome (7420247).

The spelling of 6420001 in words is "six million, four hundred twenty thousand, one".