6465081 has 16 divisors (see below), whose sum is σ = 10170368. Its totient is φ = 3574800.

The previous prime is 6465077. The next prime is 6465097. The reversal of 6465081 is 1805646.

It is not a de Polignac number, because 6465081 - 2² = 6465077 is a prime.

It is a super-2 number, since 2×6465081² = 83594544673122, which contains 22 as substring.

It is a Duffinian number.

6465081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465061) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4315 + ... + 5616.

It is an arithmetic number, because the mean of its divisors is an integer number (635648).

Almost surely, 2^6465081 is an apocalyptic number.

It is an amenable number.

6465081 is a deficient number, since it is larger than the sum of its proper divisors (3705287).

6465081 is a wasteful number, since it uses less digits than its factorization.

6465081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9972.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 6465081 is about 2542.6523553172. The cubic root of 6465081 is about 186.2907638655.

The spelling of 6465081 in words is "six million, four hundred sixty-five thousand, eighty-one".