6426021 has 16 divisors (see below), whose sum is σ = 10108928. Its totient is φ = 3553200.

The previous prime is 6426019. The next prime is 6426041. The reversal of 6426021 is 1206246.

It is a happy number.

It is not a de Polignac number, because 6426021 - 2¹ = 6426019 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426001) 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, 4285 + ... + 5586.

It is an arithmetic number, because the mean of its divisors is an integer number (631808).

Almost surely, 2^6426021 is an apocalyptic number.

It is an amenable number.

6426021 is a deficient number, since it is larger than the sum of its proper divisors (3682907).

6426021 is a wasteful number, since it uses less digits than its factorization.

6426021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6426021 is about 2534.9597629943. The cubic root of 6426021 is about 185.9148355634.

The spelling of 6426021 in words is "six million, four hundred twenty-six thousand, twenty-one".