6420917 has 16 divisors (see below), whose sum is σ = 7263360. Its totient is φ = 5640192.

The previous prime is 6420913. The next prime is 6420959. The reversal of 6420917 is 7190246.

6420917 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 6420917 - 2² = 6420913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6420917.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33173 + ... + 33365.

It is an arithmetic number, because the mean of its divisors is an integer number (453960).

Almost surely, 2^6420917 is an apocalyptic number.

It is an amenable number.

6420917 is a deficient number, since it is larger than the sum of its proper divisors (842443).

6420917 is a wasteful number, since it uses less digits than its factorization.

6420917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 6420917 is about 2533.9528409187. The cubic root of 6420917 is about 185.8656002921.

It can be divided in two parts, 6420 and 917, that added together give a palindrome (7337).

The spelling of 6420917 in words is "six million, four hundred twenty thousand, nine hundred seventeen".