5818561 has 8 divisors (see below), whose sum is σ = 6684800. Its totient is φ = 4961088.

The previous prime is 5818559. The next prime is 5818601. The reversal of 5818561 is 1658185.

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

It is a 5-Lehmer number, since φ(5818561) divides (5818561-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 5818561 - 2¹ = 5818559 is a prime.

It is a super-2 number, since 2×5818561² = 67711304221442, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5818511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696 + ... + 3481.

It is an arithmetic number, because the mean of its divisors is an integer number (835600).

Almost surely, 2^5818561 is an apocalyptic number.

5818561 is the 1393-rd octagonal number.

It is an amenable number.

5818561 is a deficient number, since it is larger than the sum of its proper divisors (866239).

5818561 is a wasteful number, since it uses less digits than its factorization.

5818561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383.

The product of its digits is 9600, while the sum is 34.

The square root of 5818561 is about 2412.1693555802. The cubic root of 5818561 is about 179.8616323459.

The spelling of 5818561 in words is "five million, eight hundred eighteen thousand, five hundred sixty-one".