45545 has 4 divisors (see below), whose sum is σ = 54660. Its totient is φ = 36432.

The previous prime is 45541. The next prime is 45553. The reversal of 45545 is 54554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54554 = 2 ⋅27277.

It can be written as a sum of positive squares in 2 ways, for example, as 10201 + 35344 = 101^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 45545 - 2² = 45541 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 45545.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45541) 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, 4550 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (13665).

2⁴⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

45545 is a deficient number, since it is larger than the sum of its proper divisors (9115).

45545 is an equidigital number, since it uses as much as digits as its factorization.

45545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114.

The product of its digits is 2000, while the sum is 23.

The square root of 45545 is about 213.4127456362. The cubic root of 45545 is about 35.7119503235.

Subtracting 45545 from its reverse (54554), we obtain a palindrome (9009).

The spelling of 45545 in words is "forty-five thousand, five hundred forty-five".