55745 has 4 divisors (see below), whose sum is σ = 66900. Its totient is φ = 44592.

The previous prime is 55733. The next prime is 55763. The reversal of 55745 is 54755.

55745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 18496 + 37249 = 136^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 55745 - 2⁶ = 55681 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5570 + ... + 5579.

It is an arithmetic number, because the mean of its divisors is an integer number (16725).

2⁵⁵⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

55745 is a deficient number, since it is larger than the sum of its proper divisors (11155).

55745 is a wasteful number, since it uses less digits than its factorization.

55745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11154.

The product of its digits is 3500, while the sum is 26.

The square root of 55745 is about 236.1037907362. The cubic root of 55745 is about 38.2004641629.

Subtracting from 55745 its reverse (54755), we obtain a triangular number (990 = T₄₄).

The spelling of 55745 in words is "fifty-five thousand, seven hundred forty-five".