54861 has 4 divisors (see below), whose sum is σ = 73152. Its totient is φ = 36572.

The previous prime is 54851. The next prime is 54869. The reversal of 54861 is 16845.

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 54861 - 2⁵ = 54829 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54869) 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, 9141 + ... + 9146.

It is an arithmetic number, because the mean of its divisors is an integer number (18288).

2⁵⁴⁸⁶¹ is an apocalyptic number.

It is an amenable number.

54861 is a deficient number, since it is larger than the sum of its proper divisors (18291).

54861 is a wasteful number, since it uses less digits than its factorization.

54861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18290.

The product of its digits is 960, while the sum is 24.

The square root of 54861 is about 234.2242515198. The cubic root of 54861 is about 37.9974605875.

The spelling of 54861 in words is "fifty-four thousand, eight hundred sixty-one".