6421266 has 12 divisors (see below), whose sum is σ = 13912782. Its totient is φ = 2140416.

The previous prime is 6421249. The next prime is 6421271. The reversal of 6421266 is 6621246.

It is a happy number.

6421266 is a `hidden beast` number, since 642 + 12 + 6 + 6 = 666.

6421266 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 2792241 = 1905^2 + 1671^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178351 + ... + 178386.

Almost surely, 2^6421266 is an apocalyptic number.

6421266 is an abundant number, since it is smaller than the sum of its proper divisors (7491516).

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

6421266 is a wasteful number, since it uses less digits than its factorization.

6421266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356745 (or 356742 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 6421266 is about 2534.0217047216. The cubic root of 6421266 is about 185.8689677197.

The spelling of 6421266 in words is "six million, four hundred twenty-one thousand, two hundred sixty-six".