6420916 has 12 divisors (see below), whose sum is σ = 11319588. Its totient is φ = 3186752.

The previous prime is 6420913. The next prime is 6420959. The reversal of 6420916 is 6190246.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 5107600 = 1146^2 + 2260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420913) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5311 + ... + 6406.

It is an arithmetic number, because the mean of its divisors is an integer number (943299).

Almost surely, 2^6420916 is an apocalyptic number.

It is an amenable number.

6420916 is a deficient number, since it is larger than the sum of its proper divisors (4898672).

6420916 is a wasteful number, since it uses less digits than its factorization.

6420916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11858 (or 11856 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6420916 is about 2533.9526435985. The cubic root of 6420916 is about 185.8655906431.

The spelling of 6420916 in words is "six million, four hundred twenty thousand, nine hundred sixteen".