6421936 has 10 divisors (see below), whose sum is σ = 12442532. Its totient is φ = 3210960.

The previous prime is 6421931. The next prime is 6421967. The reversal of 6421936 is 6391246.

It is a junction number, because it is equal to n+sod(n) for n = 6421898 and 6421907.

It is not an unprimeable number, because it can be changed into a prime (6421931) by changing a digit.

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, 200670 + ... + 200701.

Almost surely, 2^6421936 is an apocalyptic number.

It is an amenable number.

6421936 is a deficient number, since it is larger than the sum of its proper divisors (6020596).

6421936 is a wasteful number, since it uses less digits than its factorization.

6421936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401379 (or 401373 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 6421936 is about 2534.1539021930. The cubic root of 6421936 is about 185.8754320668.

The spelling of 6421936 in words is "six million, four hundred twenty-one thousand, nine hundred thirty-six".