6421106 has 4 divisors (see below), whose sum is σ = 9631662. Its totient is φ = 3210552.

The previous prime is 6421099. The next prime is 6421111. The reversal of 6421106 is 6011246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6011246 = 2 ⋅3005623.

It can be written as a sum of positive squares in only one way, i.e., 6295081 + 126025 = 2509^2 + 355^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1605275 + ... + 1605278.

Almost surely, 2^6421106 is an apocalyptic number.

6421106 is a deficient number, since it is larger than the sum of its proper divisors (3210556).

6421106 is a wasteful number, since it uses less digits than its factorization.

6421106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210555.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 6421106 is about 2533.9901341560. The cubic root of 6421106 is about 185.8674239285.

The spelling of 6421106 in words is "six million, four hundred twenty-one thousand, one hundred six".