6420105 has 24 divisors (see below), whose sum is σ = 11613888. Its totient is φ = 3274656.

The previous prime is 6420103. The next prime is 6420109. The reversal of 6420105 is 5010246.

It is a happy number.

It is not a de Polignac number, because 6420105 - 2¹ = 6420103 is a prime.

It is a super-2 number, since 2×6420105² = 82435496422050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6420103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2067 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (483912).

Almost surely, 2^6420105 is an apocalyptic number.

It is an amenable number.

6420105 is a deficient number, since it is larger than the sum of its proper divisors (5193783).

6420105 is a wasteful number, since it uses less digits than its factorization.

6420105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6237 (or 6234 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6420105 is about 2533.7926118765. The cubic root of 6420105 is about 185.8577650026.

The spelling of 6420105 in words is "six million, four hundred twenty thousand, one hundred five".