6755521 has 8 divisors (see below), whose sum is σ = 7021800. Its totient is φ = 6491520.

The previous prime is 6755519. The next prime is 6755549. The reversal of 6755521 is 1255576.

It can be written as a sum of positive squares in 4 ways, for example, as 1742400 + 5013121 = 1320^2 + 2239^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6755521 - 2¹ = 6755519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6755561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7735 + ... + 8563.

It is an arithmetic number, because the mean of its divisors is an integer number (877725).

Almost surely, 2^6755521 is an apocalyptic number.

It is an amenable number.

6755521 is a deficient number, since it is larger than the sum of its proper divisors (266279).

6755521 is a wasteful number, since it uses less digits than its factorization.

6755521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139.

The product of its digits is 10500, while the sum is 31.

The square root of 6755521 is about 2599.1385111225. The cubic root of 6755521 is about 189.0396695470.

Subtracting from 6755521 its reverse (1255576), we obtain a palindrome (5499945).

It can be divided in two parts, 67555 and 21, that added together give a palindrome (67576).

The spelling of 6755521 in words is "six million, seven hundred fifty-five thousand, five hundred twenty-one".