6411720 has 128 divisors (see below), whose sum is σ = 23328000. Its totient is φ = 1376256.

The previous prime is 6411709. The next prime is 6411749. The reversal of 6411720 is 271146.

It is a super-2 number, since 2×6411720² = 82220306716800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14056 + ... + 14504.

It is an arithmetic number, because the mean of its divisors is an integer number (182250).

Almost surely, 2^6411720 is an apocalyptic number.

6411720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6411720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11664000).

6411720 is an abundant number, since it is smaller than the sum of its proper divisors (16916280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6411720 is a wasteful number, since it uses less digits than its factorization.

6411720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 6411720 is about 2532.1374370283. The cubic root of 6411720 is about 185.7768163623.

Adding to 6411720 its reverse (271146), we get a palindrome (6682866).

The spelling of 6411720 in words is "six million, four hundred eleven thousand, seven hundred twenty".