6422420 has 24 divisors (see below), whose sum is σ = 13542984. Its totient is φ = 2558336.

The previous prime is 6422417. The next prime is 6422431. The reversal of 6422420 is 242246.

It can be written as a sum of positive squares in 4 ways, for example, as 643204 + 5779216 = 802^2 + 2404^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 6422392 and 6422401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5834 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (564291).

Almost surely, 2^6422420 is an apocalyptic number.

It is an amenable number.

6422420 is an abundant number, since it is smaller than the sum of its proper divisors (7120564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6422420 is a wasteful number, since it uses less digits than its factorization.

6422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 6422420 is about 2534.2493957778. The cubic root of 6422420 is about 185.8801015543.

Adding to 6422420 its reverse (242246), we get a palindrome (6664666).

The spelling of 6422420 in words is "six million, four hundred twenty-two thousand, four hundred twenty".