6751221 has 8 divisors (see below), whose sum is σ = 9193344. Its totient is φ = 4404960.

The previous prime is 6751189. The next prime is 6751231. The reversal of 6751221 is 1221576.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6751221 - 2⁵ = 6751189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6751191 and 6751200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6751231) 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 7 ways as a sum of consecutive naturals, for example, 23800 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (1149168).

Almost surely, 2^6751221 is an apocalyptic number.

It is an amenable number.

6751221 is a deficient number, since it is larger than the sum of its proper divisors (2442123).

6751221 is a wasteful number, since it uses less digits than its factorization.

6751221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47931.

The product of its digits is 840, while the sum is 24.

The square root of 6751221 is about 2598.3111822874. The cubic root of 6751221 is about 188.9995520831. Note that the first 3 decimals are identical.

Adding to 6751221 its reverse (1221576), we get a palindrome (7972797).

The spelling of 6751221 in words is "six million, seven hundred fifty-one thousand, two hundred twenty-one".