4164581 has 4 divisors (see below), whose sum is σ = 4243212. Its totient is φ = 4085952.

The previous prime is 4164569. The next prime is 4164583. The reversal of 4164581 is 1854614.

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 3363556 + 801025 = 1834^2 + 895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4164581 is a prime.

It is a super-2 number, since 2×4164581² = 34687469811122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4164583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39236 + ... + 39341.

It is an arithmetic number, because the mean of its divisors is an integer number (1060803).

Almost surely, 2^4164581 is an apocalyptic number.

It is an amenable number.

4164581 is a deficient number, since it is larger than the sum of its proper divisors (78631).

4164581 is an equidigital number, since it uses as much as digits as its factorization.

4164581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78630.

The product of its digits is 3840, while the sum is 29.

The square root of 4164581 is about 2040.7305064609. The cubic root of 4164581 is about 160.8880437661. Note that the first 3 decimals are identical.

The spelling of 4164581 in words is "four million, one hundred sixty-four thousand, five hundred eighty-one".