6491000 has 32 divisors (see below), whose sum is σ = 15191280. Its totient is φ = 2596000.

The previous prime is 6490999. The next prime is 6491011. The reversal of 6491000 is 1946.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 2246 + ... + 4245.

Almost surely, 2^6491000 is an apocalyptic number.

It is an amenable number.

6491000 is an abundant number, since it is smaller than the sum of its proper divisors (8700280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6491000 is a wasteful number, since it uses less digits than its factorization.

6491000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 6491000 is about 2547.7441001796. The cubic root of 6491000 is about 186.5393831828.

Adding to 6491000 its reverse (1946), we get a palindrome (6492946).

The spelling of 6491000 in words is "six million, four hundred ninety-one thousand".