44561 has 4 divisors (see below), whose sum is σ = 48624. Its totient is φ = 40500.

The previous prime is 44549. The next prime is 44563. The reversal of 44561 is 16544.

It is a happy number.

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 44561 - 2⁶ = 44497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 44561.

It is not an unprimeable number, because it can be changed into a prime (44563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015 + ... + 2036.

It is an arithmetic number, because the mean of its divisors is an integer number (12156).

2⁴⁴⁵⁶¹ is an apocalyptic number.

It is an amenable number.

44561 is a deficient number, since it is larger than the sum of its proper divisors (4063).

44561 is a wasteful number, since it uses less digits than its factorization.

44561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062.

The product of its digits is 480, while the sum is 20.

The square root of 44561 is about 211.0947654491. The cubic root of 44561 is about 35.4528899671.

The spelling of 44561 in words is "forty-four thousand, five hundred sixty-one".