6490645 has 16 divisors (see below), whose sum is σ = 9072000. Its totient is φ = 4365504.

The previous prime is 6490643. The next prime is 6490661. The reversal of 6490645 is 5460946.

It is not a de Polignac number, because 6490645 - 2¹ = 6490643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6490645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6490643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106 + ... + 3604.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^6490645 is an apocalyptic number.

It is an amenable number.

6490645 is a deficient number, since it is larger than the sum of its proper divisors (2581355).

6490645 is a wasteful number, since it uses less digits than its factorization.

6490645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6490645 is about 2547.6744297496. The cubic root of 6490645 is about 186.5359824388.

It can be divided in two parts, 64 and 90645, that added together give a palindrome (90709).

The spelling of 6490645 in words is "six million, four hundred ninety thousand, six hundred forty-five".