6411 has 4 divisors (see below), whose sum is σ = 8552. Its totient is φ = 4272.

The previous prime is 6397. The next prime is 6421. The reversal of 6411 is 1146.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6411 - 2⁵ = 6379 is a prime.

It is a super-2 number, since 2×6411² = 82201842, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

6411 is a lucky number.

It is a plaindrome in base 7 and base 14.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (2138).

2⁶⁴¹¹ is an apocalyptic number.

6411 is a deficient number, since it is larger than the sum of its proper divisors (2141).

6411 is a wasteful number, since it uses less digits than its factorization.

6411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its digits is 24, while the sum is 12.

The square root of 6411 is about 80.0687204843. The cubic root of 6411 is about 18.5769862206.

Adding to 6411 its reverse (1146), we get a palindrome (7557).

The spelling of 6411 in words is "six thousand, four hundred eleven".