6421206 has 64 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 1781760.

The previous prime is 6421201. The next prime is 6421211. The reversal of 6421206 is 6021246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6421201) and next prime (6421211).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66150 + ... + 66246.

It is an arithmetic number, because the mean of its divisors is an integer number (238140).

Almost surely, 2^6421206 is an apocalyptic number.

6421206 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6421206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7620480).

6421206 is an abundant number, since it is smaller than the sum of its proper divisors (8819754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421206 is a wasteful number, since it uses less digits than its factorization.

6421206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189.

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

The square root of 6421206 is about 2534.0098658056. The cubic root of 6421206 is about 185.8683888010.

The spelling of 6421206 in words is "six million, four hundred twenty-one thousand, two hundred six".