42418155 has 48 divisors (see below), whose sum is σ = 76157280. Its totient is φ = 20127744.

The previous prime is 42418153. The next prime is 42418157. The reversal of 42418155 is 55181424.

It is an interprime number because it is at equal distance from previous prime (42418153) and next prime (42418157).

It is not a de Polignac number, because 42418155 - 2¹ = 42418153 is a prime.

42418155 is a Rhonda number in base 10.

Its product of digits (6400) is a multiple of the sum of its prime factors (640).

It is not an unprimeable number, because it can be changed into a prime (42418153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73227 + ... + 73803.

It is an arithmetic number, because the mean of its divisors is an integer number (1586610).

Almost surely, 2^42418155 is an apocalyptic number.

42418155 is a deficient number, since it is larger than the sum of its proper divisors (33739125).

42418155 is a wasteful number, since it uses less digits than its factorization.

42418155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 627 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 42418155 is about 6512.9221552234. The cubic root of 42418155 is about 348.7524427830.

Adding to 42418155 its reverse (55181424), we get a palindrome (97599579).

The spelling of 42418155 in words is "forty-two million, four hundred eighteen thousand, one hundred fifty-five".