42555 has 8 divisors (see below), whose sum is σ = 68112. Its totient is φ = 22688.

The previous prime is 42533. The next prime is 42557. The reversal of 42555 is 55524.

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 42555 - 2⁶ = 42491 is a prime.

42555 is a lucky number.

It is a nialpdrome in base 9 and base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42555.

It is not an unprimeable number, because it can be changed into a prime (42557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (8514).

2⁴²⁵⁵⁵ is an apocalyptic number.

42555 is a deficient number, since it is larger than the sum of its proper divisors (25557).

42555 is a wasteful number, since it uses less digits than its factorization.

42555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845.

The product of its digits is 1000, while the sum is 21.

The square root of 42555 is about 206.2886327455. The cubic root of 42555 is about 34.9127076380.

The spelling of 42555 in words is "forty-two thousand, five hundred fifty-five".