42855155 has 24 divisors (see below), whose sum is σ = 60178320. Its totient is φ = 29211840.

The previous prime is 42855151. The next prime is 42855167. The reversal of 42855155 is 55155824.

It is not a de Polignac number, because 42855155 - 2² = 42855151 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (42855151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51281 + ... + 52109.

It is an arithmetic number, because the mean of its divisors is an integer number (2507430).

Almost surely, 2^42855155 is an apocalyptic number.

42855155 is a deficient number, since it is larger than the sum of its proper divisors (17323165).

42855155 is a wasteful number, since it uses less digits than its factorization.

42855155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1052 counting only the distinct ones).

The product of its digits is 40000, while the sum is 35.

The square root of 42855155 is about 6546.3848802221. The cubic root of 42855155 is about 349.9459916664.

The spelling of 42855155 in words is "forty-two million, eight hundred fifty-five thousand, one hundred fifty-five".