6485581 has 4 divisors (see below), whose sum is σ = 6591964. Its totient is φ = 6379200.

The previous prime is 6485579. The next prime is 6485587. The reversal of 6485581 is 1855846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84681 + 6400900 = 291^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 6485581 - 2¹ = 6485579 is a prime.

It is a super-2 number, since 2×6485581² = 84125521815122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6485581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6485587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53100 + ... + 53221.

It is an arithmetic number, because the mean of its divisors is an integer number (1647991).

Almost surely, 2^6485581 is an apocalyptic number.

6485581 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6485581 is a deficient number, since it is larger than the sum of its proper divisors (106383).

6485581 is a wasteful number, since it uses less digits than its factorization.

6485581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106382.

The product of its digits is 38400, while the sum is 37.

The square root of 6485581 is about 2546.6803882702. The cubic root of 6485581 is about 186.4874580377.

The spelling of 6485581 in words is "six million, four hundred eighty-five thousand, five hundred eighty-one".