6420051 has 12 divisors (see below), whose sum is σ = 10116600. Its totient is φ = 3890880.

The previous prime is 6420041. The next prime is 6420053. The reversal of 6420051 is 1500246.

It is a happy number.

It is not a de Polignac number, because 6420051 - 2¹⁷ = 6288979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420053) 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 11 ways as a sum of consecutive naturals, for example, 32326 + ... + 32523.

It is an arithmetic number, because the mean of its divisors is an integer number (843050).

Almost surely, 2^6420051 is an apocalyptic number.

6420051 is a deficient number, since it is larger than the sum of its proper divisors (3696549).

6420051 is a wasteful number, since it uses less digits than its factorization.

6420051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64866 (or 64863 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6420051 is about 2533.7819558912. The cubic root of 6420051 is about 185.8572439132.

Adding to 6420051 its reverse (1500246), we get a palindrome (7920297).

The spelling of 6420051 in words is "six million, four hundred twenty thousand, fifty-one".