6434581 has 4 divisors (see below), whose sum is σ = 6591564. Its totient is φ = 6277600.

The previous prime is 6434579. The next prime is 6434621. The reversal of 6434581 is 1854346.

It is a happy number.

6434581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1461681 + 4972900 = 1209^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 6434581 - 2¹ = 6434579 is a prime.

It is a super-2 number, since 2×6434581² = 82807665291122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6434531) 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 3 ways as a sum of consecutive naturals, for example, 78430 + ... + 78511.

It is an arithmetic number, because the mean of its divisors is an integer number (1647891).

Almost surely, 2^6434581 is an apocalyptic number.

It is an amenable number.

6434581 is a deficient number, since it is larger than the sum of its proper divisors (156983).

6434581 is a wasteful number, since it uses less digits than its factorization.

6434581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156982.

The product of its digits is 11520, while the sum is 31.

The square root of 6434581 is about 2536.6475908175. The cubic root of 6434581 is about 185.9973503303.

The spelling of 6434581 in words is "six million, four hundred thirty-four thousand, five hundred eighty-one".