6420550 has 12 divisors (see below), whose sum is σ = 11942316. Its totient is φ = 2568200.

The previous prime is 6420523. The next prime is 6420587. The reversal of 6420550 is 550246.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 64156 + ... + 64255.

It is an arithmetic number, because the mean of its divisors is an integer number (995193).

Almost surely, 2^6420550 is an apocalyptic number.

6420550 is a deficient number, since it is larger than the sum of its proper divisors (5521766).

6420550 is a wasteful number, since it uses less digits than its factorization.

6420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128423 (or 128418 counting only the distinct ones).

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

The square root of 6420550 is about 2533.8804233823. The cubic root of 6420550 is about 185.8620590547.

Adding to 6420550 its reverse (550246), we get a palindrome (6970796).

The spelling of 6420550 in words is "six million, four hundred twenty thousand, five hundred fifty".