6489521 has 8 divisors (see below), whose sum is σ = 6731424. Its totient is φ = 6251680.

The previous prime is 6489499. The next prime is 6489551. The reversal of 6489521 is 1259846.

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

It is a de Polignac number, because none of the positive numbers 2^k-6489521 is a prime.

It is a super-2 number, since 2×6489521² = 84227765618882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6489551) 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, 2450 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (841428).

Almost surely, 2^6489521 is an apocalyptic number.

It is an amenable number.

6489521 is a deficient number, since it is larger than the sum of its proper divisors (241903).

6489521 is a wasteful number, since it uses less digits than its factorization.

6489521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its digits is 17280, while the sum is 35.

The square root of 6489521 is about 2547.4538268632. The cubic root of 6489521 is about 186.5252141948.

The spelling of 6489521 in words is "six million, four hundred eighty-nine thousand, five hundred twenty-one".