6421107 has 54 divisors (see below), whose sum is σ = 11553444. Its totient is φ = 3160080.

The previous prime is 6421099. The next prime is 6421111. The reversal of 6421107 is 7011246.

It is not a de Polignac number, because 6421107 - 2³ = 6421099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (6421127) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 337944 + ... + 337962.

Almost surely, 2^6421107 is an apocalyptic number.

6421107 is a deficient number, since it is larger than the sum of its proper divisors (5132337).

6421107 is a wasteful number, since it uses less digits than its factorization.

6421107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 6421107 is about 2533.9903314733. The cubic root of 6421107 is about 185.8674335773.

The spelling of 6421107 in words is "six million, four hundred twenty-one thousand, one hundred seven".