6420617 has 8 divisors (see below), whose sum is σ = 7488000. Its totient is φ = 5503092.

The previous prime is 6420599. The next prime is 6420683. The reversal of 6420617 is 7160246.

6420617 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6420617 - 2¹⁰ = 6419593 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420697) 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, 9017 + ... + 9702.

It is an arithmetic number, because the mean of its divisors is an integer number (936000).

Almost surely, 2^6420617 is an apocalyptic number.

It is an amenable number.

6420617 is a deficient number, since it is larger than the sum of its proper divisors (1067383).

6420617 is an equidigital number, since it uses as much as digits as its factorization.

6420617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18740 (or 18726 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 6420617 is about 2533.8936441769. The cubic root of 6420617 is about 185.8627055577.

The spelling of 6420617 in words is "six million, four hundred twenty thousand, six hundred seventeen".