55042 has 16 divisors (see below), whose sum is σ = 93240. Its totient is φ = 24192.

The previous prime is 55021. The next prime is 55049. The reversal of 55042 is 24055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40401 + 14641 = 201^2 + 121^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55049) 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 7 ways as a sum of consecutive naturals, for example, 718 + ... + 790.

2⁵⁵⁰⁴² is an apocalyptic number.

55042 is a deficient number, since it is larger than the sum of its proper divisors (38198).

55042 is a wasteful number, since it uses less digits than its factorization.

55042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 55042 is about 234.6103152037. The cubic root of 55042 is about 38.0392023872.

Adding to 55042 its reverse (24055), we get a palindrome (79097).

The spelling of 55042 in words is "fifty-five thousand, forty-two".