6420530 has 16 divisors (see below), whose sum is σ = 11721024. Its totient is φ = 2531760.

The previous prime is 6420523. The next prime is 6420587. The reversal of 6420530 is 350246.

It is an unprimeable number.

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, 3812 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (732564).

Almost surely, 2^6420530 is an apocalyptic number.

6420530 is a deficient number, since it is larger than the sum of its proper divisors (5300494).

6420530 is a wasteful number, since it uses less digits than its factorization.

6420530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 6420530 is about 2533.8764768631. The cubic root of 6420530 is about 185.8618660678.

Adding to 6420530 its reverse (350246), we get a palindrome (6770776).

The spelling of 6420530 in words is "six million, four hundred twenty thousand, five hundred thirty".