4809581 has 4 divisors (see below), whose sum is σ = 5496672. Its totient is φ = 4122492.

The previous prime is 4809577. The next prime is 4809583. The reversal of 4809581 is 1859084.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4809581 - 2² = 4809577 is a prime.

It is a super-3 number, since 3×4809581³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809583) 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, 343535 + ... + 343548.

It is an arithmetic number, because the mean of its divisors is an integer number (1374168).

Almost surely, 2^4809581 is an apocalyptic number.

It is an amenable number.

4809581 is a deficient number, since it is larger than the sum of its proper divisors (687091).

4809581 is an equidigital number, since it uses as much as digits as its factorization.

4809581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687090.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 4809581 is about 2193.0756940881. The cubic root of 4809581 is about 168.7986935839.

The spelling of 4809581 in words is "four million, eight hundred nine thousand, five hundred eighty-one".