4778581 has 8 divisors (see below), whose sum is σ = 5090904. Its totient is φ = 4469760.

The previous prime is 4778569. The next prime is 4778593. The reversal of 4778581 is 1858774.

It is an interprime number because it is at equal distance from previous prime (4778569) and next prime (4778593).

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 4774225 = 66^2 + 2185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4778581 - 2⁷ = 4778453 is a prime.

It is a super-2 number, since 2×4778581² = 45669672747122, 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 (4778381) 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 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (636363).

Almost surely, 2^4778581 is an apocalyptic number.

It is an amenable number.

4778581 is a deficient number, since it is larger than the sum of its proper divisors (312323).

4778581 is a wasteful number, since it uses less digits than its factorization.

4778581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its digits is 62720, while the sum is 40.

The square root of 4778581 is about 2185.9965690732. The cubic root of 4778581 is about 168.4352494183.

The spelling of 4778581 in words is "four million, seven hundred seventy-eight thousand, five hundred eighty-one".