6420722 has 32 divisors (see below), whose sum is σ = 12127104. Its totient is φ = 2476800.

The previous prime is 6420709. The next prime is 6420731. The reversal of 6420722 is 2270246.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26522 + ... + 26762.

It is an arithmetic number, because the mean of its divisors is an integer number (378972).

Almost surely, 2^6420722 is an apocalyptic number.

6420722 is a deficient number, since it is larger than the sum of its proper divisors (5706382).

6420722 is a wasteful number, since it uses less digits than its factorization.

6420722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 6420722 is about 2533.9143631938. The cubic root of 6420722 is about 185.8637187250.

Adding to 6420722 its reverse (2270246), we get a palindrome (8690968).

The spelling of 6420722 in words is "six million, four hundred twenty thousand, seven hundred twenty-two".