42855 has 8 divisors (see below), whose sum is σ = 68592. Its totient is φ = 22848.

The previous prime is 42853. The next prime is 42859. The reversal of 42855 is 55824.

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

It is not a de Polignac number, because 42855 - 2¹ = 42853 is a prime.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42853) 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, 1414 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (8574).

2⁴²⁸⁵⁵ is an apocalyptic number.

42855 is a deficient number, since it is larger than the sum of its proper divisors (25737).

42855 is a wasteful number, since it uses less digits than its factorization.

42855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its digits is 1600, while the sum is 24.

The square root of 42855 is about 207.0144922463. The cubic root of 42855 is about 34.9945569767.

The spelling of 42855 in words is "forty-two thousand, eight hundred fifty-five".