6442420 has 24 divisors (see below), whose sum is σ = 13966848. Its totient is φ = 2493600.

The previous prime is 6442399. The next prime is 6442427. The reversal of 6442420 is 242446.

It is a junction number, because it is equal to n+sod(n) for n = 6442391 and 6442400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442427) by changing a digit.

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, 4576 + ... + 5815.

It is an arithmetic number, because the mean of its divisors is an integer number (581952).

Almost surely, 2^6442420 is an apocalyptic number.

It is an amenable number.

6442420 is an abundant number, since it is smaller than the sum of its proper divisors (7524428).

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

6442420 is a wasteful number, since it uses less digits than its factorization.

6442420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10431 (or 10429 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 6442420 is about 2538.1922701009. The cubic root of 6442420 is about 186.0728507937.

Adding to 6442420 its reverse (242446), we get a palindrome (6684866).

The spelling of 6442420 in words is "six million, four hundred forty-two thousand, four hundred twenty".