6713521 has 8 divisors (see below), whose sum is σ = 7131240. Its totient is φ = 6298368.

The previous prime is 6713513. The next prime is 6713533. The reversal of 6713521 is 1253176.

It can be written as a sum of positive squares in 4 ways, for example, as 57121 + 6656400 = 239^2 + 2580^2 .

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 6713521 - 2³ = 6713513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6713221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9115 + ... + 9823.

It is an arithmetic number, because the mean of its divisors is an integer number (891405).

Almost surely, 2^6713521 is an apocalyptic number.

It is an amenable number.

6713521 is a deficient number, since it is larger than the sum of its proper divisors (417719).

6713521 is a wasteful number, since it uses less digits than its factorization.

6713521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 1260, while the sum is 25.

The square root of 6713521 is about 2591.0463137505. The cubic root of 6713521 is about 188.6470930067.

Adding to 6713521 its reverse (1253176), we get a palindrome (7966697).

The spelling of 6713521 in words is "six million, seven hundred thirteen thousand, five hundred twenty-one".