6005421 has 20 divisors (see below), whose sum is σ = 9048864. Its totient is φ = 3969000.

The previous prime is 6005401. The next prime is 6005429. The reversal of 6005421 is 1245006.

It is a happy number.

It is not a de Polignac number, because 6005421 - 2⁶ = 6005357 is a prime.

6005421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6005394 and 6005403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6005429) 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 in 19 ways as a sum of consecutive naturals, for example, 11986 + ... + 12476.

Almost surely, 2^6005421 is an apocalyptic number.

It is an amenable number.

6005421 is a deficient number, since it is larger than the sum of its proper divisors (3043443).

6005421 is a wasteful number, since it uses less digits than its factorization.

6005421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6005421 is about 2450.5960499438. The cubic root of 6005421 is about 181.7667684251.

The spelling of 6005421 in words is "six million, five thousand, four hundred twenty-one".