54545 has 4 divisors (see below), whose sum is σ = 65460. Its totient is φ = 43632.

The previous prime is 54541. The next prime is 54547.

54545 is nontrivially palindromic in base 10.

54545 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 38416 = 127^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 54545 - 2² = 54541 is a prime.

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

54545 is an undulating number in base 10.

54545 is a modest number, since divided by 4545 gives 5 as remainder.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 54545.

It is not an unprimeable number, because it can be changed into a prime (54541) 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, 5450 + ... + 5459.

It is an arithmetic number, because the mean of its divisors is an integer number (16365).

2⁵⁴⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

54545 is a deficient number, since it is larger than the sum of its proper divisors (10915).

54545 is a wasteful number, since it uses less digits than its factorization.

54545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914.

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

The square root of 54545 is about 233.5487101227. The cubic root of 54545 is about 37.9243647910.

The spelling of 54545 in words is "fifty-four thousand, five hundred forty-five".