6420622 has 8 divisors (see below), whose sum is σ = 10371816. Its totient is φ = 2963352.

The previous prime is 6420599. The next prime is 6420683. The reversal of 6420622 is 2260246.

It is a happy number.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6420593 and 6420602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123448 + ... + 123499.

It is an arithmetic number, because the mean of its divisors is an integer number (1296477).

Almost surely, 2^6420622 is an apocalyptic number.

6420622 is a deficient number, since it is larger than the sum of its proper divisors (3951194).

6420622 is a wasteful number, since it uses less digits than its factorization.

6420622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246962.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 6420622 is about 2533.8946308006. The cubic root of 6420622 is about 185.8627538040.

Adding to 6420622 its reverse (2260246), we get a palindrome (8680868).

The spelling of 6420622 in words is "six million, four hundred twenty thousand, six hundred twenty-two".