42055 has 8 divisors (see below), whose sum is σ = 54432. Its totient is φ = 31008.

The previous prime is 42043. The next prime is 42061. The reversal of 42055 is 55024.

It is a happy number.

42055 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42055 - 2⁵ = 42023 is a prime.

It is an Ulam number.

It is a Duffinian number.

42055 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

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, 259 + ... + 388.

It is an arithmetic number, because the mean of its divisors is an integer number (6804).

2⁴²⁰⁵⁵ is an apocalyptic number.

42055 is the 130-th heptagonal number.

42055 is a deficient number, since it is larger than the sum of its proper divisors (12377).

42055 is a wasteful number, since it uses less digits than its factorization.

42055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

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

The square root of 42055 is about 205.0731576779. The cubic root of 42055 is about 34.7754329627.

Adding to 42055 its reverse (55024), we get a palindrome (97079).

It can be divided in two parts, 4205 and 5, that multiplied together give a square (21025 = 145²).

The spelling of 42055 in words is "forty-two thousand, fifty-five".