6420422 has 4 divisors (see below), whose sum is σ = 9630636. Its totient is φ = 3210210.

The previous prime is 6420413. The next prime is 6420431. The reversal of 6420422 is 2240246.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6420413) and next prime (6420431).

It is a junction number, because it is equal to n+sod(n) for n = 6420394 and 6420403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605104 + ... + 1605107.

It is an arithmetic number, because the mean of its divisors is an integer number (2407659).

Almost surely, 2^6420422 is an apocalyptic number.

6420422 is a deficient number, since it is larger than the sum of its proper divisors (3210214).

6420422 is a wasteful number, since it uses less digits than its factorization.

6420422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210213.

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

The square root of 6420422 is about 2533.8551655531. The cubic root of 6420422 is about 185.8608239319.

Adding to 6420422 its reverse (2240246), we get a palindrome (8660668).

The spelling of 6420422 in words is "six million, four hundred twenty thousand, four hundred twenty-two".