6751220 has 54 divisors (see below), whose sum is σ = 16693362. Its totient is φ = 2286816.

The previous prime is 6751189. The next prime is 6751231. The reversal of 6751220 is 221576.

6751220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5400976 + 1350244 = 2324^2 + 1162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 81299 + ... + 81381.

Almost surely, 2^6751220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6751220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8346681).

6751220 is an abundant number, since it is smaller than the sum of its proper divisors (9942142).

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

6751220 is a wasteful number, since it uses less digits than its factorization.

6751220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 6751220 is about 2598.3109898548. The cubic root of 6751220 is about 188.9995427515. Note that the first 3 decimals are identical.

Adding to 6751220 its reverse (221576), we get a palindrome (6972796).

The spelling of 6751220 in words is "six million, seven hundred fifty-one thousand, two hundred twenty".