6005721 has 16 divisors (see below), whose sum is σ = 8281728. Its totient is φ = 3868800.

The previous prime is 6005719. The next prime is 6005749. The reversal of 6005721 is 1275006.

It is not a de Polignac number, because 6005721 - 2¹ = 6005719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6007721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19156 + ... + 19466.

It is an arithmetic number, because the mean of its divisors is an integer number (517608).

Almost surely, 2^6005721 is an apocalyptic number.

It is an amenable number.

6005721 is a deficient number, since it is larger than the sum of its proper divisors (2276007).

6005721 is a wasteful number, since it uses less digits than its factorization.

6005721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 6005721 is about 2450.6572587777. The cubic root of 6005721 is about 181.7697950862.

The spelling of 6005721 in words is "six million, five thousand, seven hundred twenty-one".