6489021 has 24 divisors (see below), whose sum is σ = 10982304. Its totient is φ = 3370080.

The previous prime is 6488987. The next prime is 6489083. The reversal of 6489021 is 1209846.

It is not a de Polignac number, because 6489021 - 2⁷ = 6488893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6489021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6489221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (457596).

Almost surely, 2^6489021 is an apocalyptic number.

It is an amenable number.

6489021 is a deficient number, since it is larger than the sum of its proper divisors (4493283).

6489021 is a wasteful number, since it uses less digits than its factorization.

6489021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6489021 is about 2547.3556877672. The cubic root of 6489021 is about 186.5204236510.

It can be divided in two parts, 648 and 9021, that added together give a palindrome (9669).

The spelling of 6489021 in words is "six million, four hundred eighty-nine thousand, twenty-one".