6421473 has 6 divisors (see below), whose sum is σ = 9275474. Its totient is φ = 4280976.

The previous prime is 6421421. The next prime is 6421477. The reversal of 6421473 is 3741246.

6421473 is a `hidden beast` number, since 642 + 14 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5817744 + 603729 = 2412^2 + 777^2 .

It is not a de Polignac number, because 6421473 - 2⁹ = 6420961 is a prime.

It is a Duffinian number.

6421473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6421477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356740 + ... + 356757.

Almost surely, 2^6421473 is an apocalyptic number.

It is an amenable number.

6421473 is a deficient number, since it is larger than the sum of its proper divisors (2854001).

6421473 is a wasteful number, since it uses less digits than its factorization.

6421473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713503 (or 713500 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 6421473 is about 2534.0625485572. The cubic root of 6421473 is about 185.8709649615.

The spelling of 6421473 in words is "six million, four hundred twenty-one thousand, four hundred seventy-three".