6550420 has 24 divisors (see below), whose sum is σ = 13835304. Its totient is φ = 2605056.

The previous prime is 6550417. The next prime is 6550471. The reversal of 6550420 is 240556.

It can be written as a sum of positive squares in 4 ways, for example, as 1406596 + 5143824 = 1186^2 + 2268^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6550391 and 6550400.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3012 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (576471).

Almost surely, 2^6550420 is an apocalyptic number.

It is an amenable number.

6550420 is an abundant number, since it is smaller than the sum of its proper divisors (7284884).

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

6550420 is a wasteful number, since it uses less digits than its factorization.

6550420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 6550420 is about 2559.3788308885. The cubic root of 6550420 is about 187.1068621963.

Adding to 6550420 its reverse (240556), we get a palindrome (6790976).

The spelling of 6550420 in words is "six million, five hundred fifty thousand, four hundred twenty".